Seroconversion factor was defined as the fold increase in serum HI GMTs post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09.

A seroconverted subject was defined as: For initially seronegative subjects [antibody titer below (<) 1:10 prior to vaccination], antibody titer ≥ 1:40 after vaccination; For initially seropositive subjects (antibody titer ≥ 1:10 prior to vaccination), at least a 4-fold increase in post-vaccination antibody titer. The flu strain assessed was Flu A/CAL/7/09.

Seroprotection was defined as the percentage of subjects with a serum HI titer ≥ 1:40, that usually is accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

Seroconversion factor was defined as the fold increase in serum HI GMTs post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09.

The seropositivity cut-off value of the assay was ≥ 1:8 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/Neth/602/09.

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:8. The flu strain assessed was A/Netherlands/602/2009 (H1N1)v-like (Flu A/Neth/602/09).

The seropositivity cut-off value of the assay was ≥ 1:8 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/Neth/602/09.

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:8. The flu strain assessed was Flu A/Neth/602/09.

A seroconverted subject was defined as: For initially seronegative subjects, antibody titer ≥ 1:32 after vaccination; For initially seropositive subjects, at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/Neth/602/09.

A seroconverted subject was defined as: For initially seronegative subjects, antibody titer ≥ 1:32 after vaccination; For initially seropositive subjects, at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/Neth/602/09.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 50 millimeters (mm) of injection site.

Assessed solicited general symptoms were diarrhea, drowsiness, irritability, loss of appetite, shivering, sweating and fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)]. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

Assessed solicited general symptoms were arthralgia, fatigue, gastrointestinal, headache, myalgia, shivering and fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)]. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

MAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination.

An AESI was defined as an AE including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration.

Among biochemical parameters assessed were alanine aminotransferase [ALAT], aspartate aminotransferase [ASAT], bilirubin [BILI], creatinine [CREA] and blood urea nitrogen [BUN]. Levels of biochemical parameters assessed in terms of normal laboratory values were - unknown, below, within and above.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. Grade 3 AE = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to the vaccination.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. Grade 3 AE = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to the vaccination.

Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

For additional information about this study please refer to the GSK Clinical Study Register

For additional information about this study please refer to the GSK Clinical Study Register

For additional information about this study please refer to the GSK Clinical Study Register

For additional information about this study please refer to the GSK Clinical Study Register

For additional information about this study please refer to the GSK Clinical Study Register

For additional information about this study please refer to the GSK Clinical Study Register

Healthy male or female children between 10 to 17 years of age (10-17Y), who received 2 primary doses of GSK2340272A vaccine according to a 0, 21-day schedule, administered intramuscularly in the deltoid region of the arm.

Total of all reporting groups

The seropositivity cut-off value of the assay was ≥ 1:10 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:10. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the According-to-Protocol (ATP) cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:10. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

A seroconverted subject was defined as: For initially seronegative subjects [antibody titer below (<) 1:10 prior to vaccination], antibody titer ≥ 1:40 after vaccination; For initially seropositive subjects (antibody titer ≥ 1:10 prior to vaccination), at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

Seroprotection was defined as the percentage of subjects with a serum HI titer ≥ 1:40, that usually is accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

Seroconversion factor was defined as the fold increase in serum HI GMTs post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

The seropositivity cut-off value of the assay was ≥ 1:10 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:10. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

A seroconverted subject was defined as: For initially seronegative subjects [antibody titer below (<) 1:10 prior to vaccination], antibody titer ≥ 1:40 after vaccination; For initially seropositive subjects (antibody titer ≥ 1:10 prior to vaccination), at least a 4-fold increase in post-vaccination antibody titer. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

Seroprotection was defined as the percentage of subjects with a serum HI titer ≥ 1:40, that usually is accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

Seroconversion factor was defined as the fold increase in serum HI GMTs post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

The seropositivity cut-off value of the assay was ≥ 1:8 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/Neth/602/09.

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:8. The flu strain assessed was A/Netherlands/602/2009 (H1N1)v-like (Flu A/Neth/602/09).

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

The seropositivity cut-off value of the assay was ≥ 1:8 in the sera of subjects seronegative before vaccination. The flu strain assesssed was Flu A/Neth/602/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

Antibody titers were presented as geometric mean titers (GMTs). The reference seropositivity cut-off value was ≥ 1:8. The flu strain assessed was Flu A/Neth/602/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

A seroconverted subject was defined as: For initially seronegative subjects, antibody titer ≥ 1:32 after vaccination; For initially seropositive subjects, at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/Neth/602/09.

The analysis was performed on the ATP cohort for immunogenicity at Day 42, which included all evaluable subjects for whom 2 doses were taken and assay results were available for antibodies against H1N1 antigen for the blood sample taken 21 days after the second vaccine dose given at Day 21.

A seroconverted subject was defined as: For initially seronegative subjects, antibody titer ≥ 1:32 after vaccination; For initially seropositive subjects, at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/Neth/602/09.

The analysis was performed on the ATP cohort for persistence at Month 12, which included all evaluable subjects for whom data concerning immunogenicity outcome measures were available. This included subjects for whom assay results were available for antibodies against the study vaccine antigen component at Month 12.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 redness/swelling = redness/swelling spreading beyond 50 millimeters (mm) of injection site.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects who filled in their symptom sheets.

Assessed solicited general symptoms were diarrhea, drowsiness, irritability, loss of appetite, shivering, sweating and fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)]. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects who filled in their symptom sheets.

Assessed solicited general symptoms were arthralgia, fatigue, gastrointestinal, headache, myalgia, shivering and fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)]. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects who filled in their symptom sheets.

MAEs were defined as events for which the subject received medical attention defined as hospitalization, an emergency room visit, or a visit to or from medical personnel (medical doctor) for any reason. Any MAE(s) = Occurrence of any MAE(s) regardless of intensity grade or relation to vaccination.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

An AESI was defined as an AE including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

Among biochemical parameters assessed were alanine aminotransferase [ALAT], aspartate aminotransferase [ASAT], bilirubin [BILI], creatinine [CREA] and blood urea nitrogen [BUN]. Levels of biochemical parameters assessed in terms of normal laboratory values were - unknown, below, within and above.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. Grade 3 AE = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to the vaccination.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. Grade 3 AE = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to the vaccination.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects.

Healthy male or female children between 6 to 9 years of age (6-9Y), who received 2 primary doses of GSK2340272A vaccine according to a 0, 21-day schedule, administered intramuscularly in the deltoid region of the arm.

Healthy male or female children between 10 to 17 years of age (10-17Y), who received 2 primary doses of GSK2340272A vaccine according to a 0, 21-day schedule, administered intramuscularly in the deltoid region of the arm.