Subjects 18-64 years of age (in H9N2 cohort of primary completed studyQ-PAN H9N2-001 (116358)(A/chicken/Hong Kong/G9/1997 NIBRG-91)) who were administered unadjuvanted pandemic vaccine with 15 µg HA (hemagglutinin) at Days 0 and 21 and with saline placebo at Day 182.

Subjects 18-≤39 years of age (in D-QIV cohort of primary completed study FLU D-QIV-015 (201251) (A/Christchurch/16/2010 (H1N1)pdm09, A/Texas/50/2012 (H3N2), B/Massachusetts/02/2012, B/Brisbane/60/2008)) who were administered 15 µg HA (no AS) of each of 4 strains (total 60 µg HA) at Day 0.

Subjects 18-40 years of age (in Q-PAN cohort of primary completed study Q-PAN-005 (110624)) who were administered 3.8 µg A/Indonesia/5/05 (H5N1) with AS03A on Day 0; phosphate buffer saline (PBS) preserved with 20 ppm thimerosal on Day 182; 3.8 µg A/turkey/Turkey/1/05 (H5N1) with AS03A on Day 549.

Subjects 18-40 years of age (in Q-PAN cohort of primary completed study Q-PAN-005 (110624)) who were administered PBS preserved with 20 ppm thimerosal on Day 0; 3.8 µg A/turkey/Turkey/1/05 (H5N1) with AS03A on Days 182 and 549.

Subjects 18-60 years of age (in H5N1 cohort of primary completed study H5N1-012 (107495) A/Vietnam/1194/2004-like or A/Indonesia/05/2005-like) who received two administrations of the adjuvanted (AS03A) pandemic influenza vaccine (3.8 µg) containing the Vietnam (VT) strain at Day 0 and Month 12.

Subjects 18-60 years of age (in H5N1 cohort of primary completed studyH5N1-012 (107495) A/Vietnam/1194/2004-like or A/Indonesia/05/2005-like) who received one administration(3.8 µg) of the adjuvanted (AS03A) pandemic influenza vaccine containing the Vietnam (VT) strain at Day 0 and one administration(3.8 µg) of the adjuvanted (AS03A) pandemic vaccine containing the Indonesia (IN) strain at Month 12.

Subjects 6-35 months of age (in H5N1 cohort of primary completed study Q-PAN H5N1-AS03-021 (114464)(A/Indonesia/5/2005 RG)) who were administered adjuvanted (AS03B) pandemic vaccine with 1.9 µg HA (hemagglutinin) at Days 0 and 21.

Subjects 6-35 months of age (in H5N1 cohort of primary completed study Q-PAN H5N1-AS03-021 (114464)(A/Indonesia/5/2005 RG)) who were administered placebo at Days 0 and 21.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination 10-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 330 EU/mL at post-vaccination, For initially seropositive subjects, antibody concentration at post-vaccination ≥ 10-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 66 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL).

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 132 EU/mL at post-vaccination. For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination 10-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 330 EU/mL at post-vaccination, For initially seropositive subjects, antibody concentration at post-vaccination ≥ 10-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 66 Elisa Unit per milliliter (EU/mL).

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL).

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 132 EU/mL at post-vaccination. For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination 10-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 330 EU/mL at post-vaccination, For initially seropositive subjects, antibody concentration at post-vaccination ≥ 10-fold the pre-vaccination antibody concentration. The ≥10-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 66 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 132 EU/mL at post-vaccination. For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination 10-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 330 EU/mL at post-vaccination, For initially seropositive subjects, antibody concentration at post-vaccination ≥ 10-fold the pre-vaccination antibody concentration. The ≥10-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 66 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 132 EU/mL at post-vaccination. For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination 10-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 330 EU/mL at post-vaccination, For initially seropositive subjects, antibody concentration at post-vaccination ≥ 10-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all subjects in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by microneutralization (MN) for all subjects who received an adjuvant system (AS) vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/Dilution (1/DIL).

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 10-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 50 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 10-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titerss greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 10-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 50 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 10-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 10-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 50 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 10-fold the pre-vaccination antibody titer. The ≥10-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 10-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 50 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 10-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for anti-H1 stalk MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for anti-H1 stalk MN prior to vaccination. 10-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 50 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 10-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H1 stalk antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohortand for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H2 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H2 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohortand for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with concentrations greater or equal than 50 Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Geometric mean concentrations (GMCs) were expressed in Elisa Unit per milliliter (EU/mL)

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = concentration < 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. seropositive subjects = concentration ≥ 50 EU/mL for anti-H18 HA (full length) antibody prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 100 EU/mL at post-vaccination; For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of anti-H18 antibody by ELISA for the subjects who received an AS vaccine in each study cohort and for the subjects in the FLU D-QIV-015 study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMC over pre-vaccination GMC.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/Dilution )

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. seropositive subjects = titer ≥ 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titerss greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. seropositive subjects = titer ≥ 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. seropositive subjects = titer ≥ 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for RG reassortant virus (H5N8) MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of RG reassortant virus (H5N8) antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/Dilution ).

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. seropositive subjects = titer ≥ 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titerss greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. seropositive subjects = titer ≥ 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. seropositive subjects = titer ≥ 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for H1N1 swine Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1 swine Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/Dilution).

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination. seropositive subjects = titer ≥ 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titerss greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer. The ≥4-fold increases were only calculated relative to baseline.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Seropositivity rate was defined as the percentage of subjects with titers greater or equal than 10 1/DIL

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, Geometric mean titers (GMTs) were calculated with 95% CI for each treatment group within each study cohort.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. seronegative subjects = titer < 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination seropositive subjects = titer ≥ 10 1/DIL for H1N1pdm09-like Flu virus MN prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody titer ≥ 20 1/DIL at post-vaccination; For initially seropositive subjects, antibody titer at post-vaccination ≥ 4-fold the pre-vaccination antibody titer.

With respect to samples from HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and quadrivalent inactivated seasonal, influenza vaccines, analysis was performed for measuring levels of H1N1pdm09-like Flu virus antibody by MN for all subjects who received an AS vaccine in each study cohort, aggregate variables were calculated with 95% CI for each treatment group within each study cohort. Mean Geometric Increase (MGI) = post-vaccination GMT over pre-vaccination GMT.

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all the subjects in the adult CCPan H5N1-001, the Q-Pan H1N1-019 and the Q-Pan H9N2-001 study cohorts. Geometric mean concentration (AS Group and no AS group within each study) was calculated with 95% CI at each specified time point and expressed in Elisa Unit per milliliter (EU/mL).

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all the subjects in the adult CCPan H5N1-001, the Q-Pan H1N1-019 and the Q-Pan H9N2-001 study cohorts. Geometric mean concentration (AS Group and no AS group within each study) was calculated with 95% CI at each specified time point and expressed in Elisa Unit per milliliter (EU/mL).

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all the subjects in the adult CCPan H5N1-001, the Q-Pan H1N1-019 and the Q-Pan H9N2-001 study cohorts. Percentage of subjects with at least 4-fold increase to anti-H1 stalk ELISA was calculated with 95% CI at each specified time point. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 132 EU/mL at post-vaccination. For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all the subjects in the adult CCPan H5N1-001, the Q-Pan H1N1-019 and the Q-Pan H9N2-001 study cohorts. Percentage of subjects with at least 4-fold increase to anti-H1 stalk ELISA was calculated with 95% CI at each specified time point. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 132 EU/mL at post-vaccination. For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1,and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring levels of anti-H1 stalk antibody by ELISA for all the subjects in the adult CCPan H5N1-001, the Q-Pan H1N1-019 and the Q-Pan H9N2-001 study cohorts. Percentage of subjects with at least 4-fold increase to anti-H1 stalk ELISA was calculated with 95% CI at each specified time point. seronegative subjects = concentration < 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. seropositive subjects = concentration ≥ 66 EU/mL for anti-H1 stalk ELISA prior to vaccination. 4-fold increase defined as: For initially seronegative subjects, antibody concentration ≥ 132 EU/mL at post-vaccination. For initially seropositive subjects, antibody concentration at post-vaccination ≥ 4-fold the pre-vaccination antibody concentration.

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1, and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring the number of subjects with seropositivity status at baseline (Day 0) for the HI assay against the pandemic vaccine homologous virus - Adult Q-PAN H1N1-019, CC-PAN H5N1-001, Q-PAN H9N2-001 cohorts. Seronegative subjects = Subjects with antibody titer < 10 1/DIL for Pandemic vaccine homologous virus and Seropositive subjects = Subjects with antibody titer ≥ 10 1/DIL for Pandemic vaccine homologous virus (i.e., A/California/7/2009 for subjects from the Q-PAN H1N1-019 study, A/Indonesia/5/2005 for subjects from CC-PAN H5N1-001 study, A/chicken/Hong Kong/G9/1997 for subjects from Q-PAN H9N2-001 study).

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1, and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring the number of subjects with seropositivity status at baseline (at Day 0 in all subjects except for group G of Q-PAN-005 [i.e, at Day182]) for the HI assay against the pandemic vaccine homologous virus - Adult FLU D-QIV-015, Q-PAN-005, H5N1-012 cohorts . Seronegative subjects = Subjects with antibody titer < 10 1/DIL for Pandemic vaccine homologous virus and Seropositive subjects = Subjects with antibody titer ≥ 10 1/DIL for Pandemic vaccine homologous virus (i.e., for FLU D-QIV-015: A/Christchurch/16/2010 at Day 0, for Q-PAN-005 study, group C: A/Turkey/01/2005 and A/Indonesia/5/2005 at Day 0 and for group G, A/Turkey/01/2005 at Day 182, for H5N1-012 study, for group VT/VT/12M : A/Vietnam/1194/2004 at Day 0, for group VT/IN/12M, A/Indonesia/5/2005 and A/Vietnam/1194/2004-like at Day 0).

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1, and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring the number of subjects with seropositivity status at pre-vaccination (Baseline) for the HI assay against A/California/7/09 virus (or like virus) - Adult Q-PAN H1N1-019, CC-PAN H5N1-001, Q-PAN H9N2-001, Q-PAN-005, H5N1-012 cohorts. Seronegative subjects = Subjects with antibody titer < 10 1/DIL for A/California/7/09 virus (or like virus) and Seropositive subjects = Subjects with antibody titer ≥ 10 1/DIL for A/California/7/09 virus (or like virus).

With respect to samples from the HA Group 1-related studies (i.e., with H1N1, H5N1, and H9N2 pandemic, and IIV4 seasonal, influenza vaccines), analysis was performed for measuring the number of subjects with seropositivity status against Flu A/Indonesia/05/2005 (H5N1) HI antibodies - Pediatric H5N1 cohort. Seronegative subjects = Subjects with antibody titer < 10 1/DIL for Flu A/Ind/05/05 (H5N1).HA HI prior to vaccination and Seropositive subjects = Subjects with antibody titer ≥ 10 1/DIL for Flu A/Ind/05/05 (H5N1).HA HI prior to vaccination.

Subjects 18-49 years of age (in H5N1 cohort of primary completed study CC-PAN H5N1-001 (114371)(A/Indonesia/5/2005 RG)) who were administered adjuvanted (AS03A) pandemic vaccine with 3.75 µg HA (hemagglutinin) at Days 0 and 21

Subjects 18-49 years of age (in H5N1 cohort of primary completed study CC-PAN H5N1-001 (114371)(A/Indonesia/5/2005 RG)) who were administered unadjuvanted pandemic vaccine with 15 µg HA (hemagglutinin) at Days 0 and 21

Subjects 18-64 years of age (in H9N2 cohort of primary completed study Q-PAN H9N2-001 (116358) (A/chicken/Hong Kong/G9/1997 NIBRG-91)) who were administered adjuvanted (AS03A) pandemic vaccine with 3.75 µg HA (hemagglutinin) at Days 0 and 21 and saline placebo at Day 182.

Subjects 18-64 years of age (in H9N2 cohort of primary completed studyQ-PAN H9N2-001 (116358)(A/chicken/Hong Kong/G9/1997 NIBRG-91)) who were administered unadjuvanted pandemic vaccine with 15 µg HA (hemagglutinin) at Days 0 and 21 and with saline placebo at Day 182.

Subjects 18-≤39 years of age (in D-QIV cohort of primary completed study FLU D-QIV-015 (201251) (A/Christchurch/16/2010 (H1N1)pdm09, A/Texas/50/2012 (H3N2), B/Massachusetts/02/2012, B/Brisbane/60/2008)) who were administered 15 µg HA (no AS) of each of 4 strains (total 60 µg HA) at Day 0.

Subjects 18-40 years of age (in Q-PAN cohort of primary completed study Q-PAN-005 (110624)) who were administered 3.8 µg A/Indonesia/5/05 (H5N1) with AS03A on Day 0; phosphate buffer saline (PBS) preserved with 20 ppm thimerosal on Day 182; 3.8 µg A/turkey/Turkey/1/05 (H5N1) with AS03A on Day 549.

Subjects 18-40 years of age (in Q-PAN cohort of primary completed study Q-PAN-005 (110624)) who were administered PBS preserved with 20 ppm thimerosal on Day 0; 3.8 µg A/turkey/Turkey/1/05 (H5N1) with AS03A on Days 182 and 549.

Subjects 18-60 years of age (in H5N1 cohort of primary completed study H5N1-012 (107495) A/Vietnam/1194/2004-like or A/Indonesia/05/2005-like) who received two administrations of the adjuvanted (AS03A) pandemic influenza vaccine (3.8 µg) containing the Vietnam (VT) strain at Day 0 and Month 12.

Subjects 18-60 years of age (in H5N1 cohort of primary completed studyH5N1-012 (107495) A/Vietnam/1194/2004-like or A/Indonesia/05/2005-like) who received one administration (3.8 µg) of the adjuvanted (AS03A) pandemic influenza vaccine containing the Vietnam (VT) strain at Day 0 and one administration (3.8 µg) of the adjuvanted (AS03A) pandemic vaccine containing the Indonesia (IN) strain at Month 12

Subjects 6-35 months of age (in H5N1 cohort of primary completed study Q-PAN H5N1-AS03-021 (114464)(A/Indonesia/5/2005 RG)) who were administered adjuvanted (AS03B) pandemic vaccine with 1.9 µg HA (hemagglutinin) at Days 0 and 21.

Subjects 6-35 months of age (in H5N1 cohort of primary completed study Q-PAN H5N1-AS03-021 (114464)(A/Indonesia/5/2005 RG)) who were administered placebo at Days 0 and 21.