Healthy male or female children, between 3 and 5 years of age (Y3-5) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 3 (F3) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 6 and 9 years of age (Y6-9) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 3 (F3) in the deltoid region of the arm, according to a 0-21 day schedule.

Seroconversion (SCR) was defined as: For initially seronegative subjects (pre-vaccination titer below < 1:10), a post-vaccination titer ≥ 1:40. For initially seropositive subjects (pre-vaccination titer ≥ 1:10), at least a 4-fold increase in post-vaccination titer. The flu strain assessed was Flu A/CAL/7/09.

A seroprotected subject was defined as a vaccinated subject with a serum HI titer ≥ 1:40, which is usually accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

GMFR, also called seroconversion factor (SCF), was defined as the fold increase in serum HI geometric mean titers (GMTs) post-vaccination compared to pre-vaccination. The flu strain assessed was Flu A/CAL/7/09.

Assessed solicited local symptoms were pain, redness and swelling. Any = incidence of a particular symptom regardless of intensity grade or relationship to vaccinations. Grade 3 pain (children below 6 years of age) = cried when limb was moved/spontaneously painful. Grade 3 pain (children above 6 years of age) = significant pain at rest; pain that prevented normal everyday activities. Grade 3 redness/swelling = redness/swelling spreading beyond 50 millimeters (mm) of injection site.

Assessed solicited general symptoms were drowsiness, irritability, loss of appetite and fever [defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)]. Any = incidence of a particular symptom regardless of intensity grade or relationship to vaccinations. Grade 3 drowsiness = drowsiness which prevented normal everyday activities. Grade 3 irritability = crying that could not be comforted/prevented normal activity. Grade 3 loss of appetite = not eating at all. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the vaccination

Assessed solicited general symptoms were fatigue, gastrointestinal, headache and temperature [defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)]. Any = incidence of a particular symptom regardless of intensity grade or relationship to vaccinations. Grade 3 = symptom which prevented normal everyday activity. Related = symptom assessed by the investigator as causally related to the vaccination. Grade 3 fever = fever > 39.0 °C.

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.

Adverse events of specific interest (AESI) were defined as AEs including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration. Potential immune-mediated diseases (pIMDs) are a subset of AEs that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune aetiology.

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 3 and 5 years of age (Y3-5) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 2 (F2) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 6 and 9 years of age (Y6-9) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 2 (F2) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 3 and 5 years of age (Y3-5) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 3 (F3) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 6 and 9 years of age (Y6-9) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 3 (F3) in the deltoid region of the arm, according to a 0-21 day schedule.

Total of all reporting groups

Healthy male or female children, between 3 and 9 years of age at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 2 (F2) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 3 and 9 years of age at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 3 (F3) in the deltoid region of the arm, according to a 0-21 day schedule.

A seropositive subject was defined as a subject with a serum HI titer equal to or above (≥) 1:10. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

Seroconversion (SCR) was defined as: For initially seronegative subjects [pre-vaccination titer below (<) 1:10], a post-vaccination titer ≥ 1:40. For initially seropositive subjects (pre-vaccination titer ≥ 1:10), 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, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

A seroprotected subject was defined as a vaccinated subject with a serum HI titer ≥ 1:40, which is usually accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

GMFR, also called seroconversion factor (SCF), was defined as the fold increase in serum HI geometric mean titers (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, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

A seropositive subject was defined as a subject with a serum HI titer equal to or above (≥) 1:10. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

Humoral immune response in terms of vaccine H1N1 haemagglutination inhibition (HI) antibodies against A/California/7/2009 (H1N1)v-like virus (Flu A/CAL/7/09) has been assessed. Antibody titers were presented as geometric mean titers (GMTs).

The analysis was performed on the ATP cohort for immunogenicity, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

Seroconversion (SCR) was defined as: For initially seronegative subjects (pre-vaccination titer below < 1:10), a post-vaccination titer ≥ 1:40. For initially seropositive subjects (pre-vaccination titer ≥ 1:10), 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, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

A seroprotected subject was defined as a vaccinated subject with a serum HI titer ≥ 1:40, which is usually accepted as indicating protection. The flu strain assessed was Flu A/CAL/7/09.

The analysis was performed on the ATP cohort for immunogenicity, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

GMFR, also called seroconversion factor (SCF), was defined as the fold increase in serum HI geometric mean titers (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, which included all evaluable subjects who received 2 doses of study vaccine and for whom assay results were available for antibodies against H1N1 antigen for any blood sample taken up to Month 7 after first vaccine dose.

Assessed solicited local symptoms were pain, redness and swelling. Any = incidence of a particular symptom regardless of intensity grade or relationship to vaccinations. Grade 3 pain (children below 6 years of age) = cried when limb was moved/spontaneously painful. Grade 3 pain (children above 6 years of age) = significant pain at rest; pain that prevented normal everyday activities. 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 with at least 1 vaccine administration documented.

Assessed solicited general symptoms were drowsiness, irritability, loss of appetite and fever [defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)]. Any = incidence of a particular symptom regardless of intensity grade or relationship to vaccinations. Grade 3 drowsiness = drowsiness which prevented normal everyday activities. Grade 3 irritability = crying that could not be comforted/prevented normal activity. Grade 3 loss of appetite = not eating at all. Grade 3 fever = fever > 39.0 °C. Related = symptom assessed by the investigator as causally related to the vaccination

The analysis was performed on the Total Vaccinated Cohort, which included all vaccinated subjects with at least 1 vaccine administration documented.

Assessed solicited general symptoms were fatigue, gastrointestinal, headache and temperature [defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)]. Any = incidence of a particular symptom regardless of intensity grade or relationship to vaccinations. Grade 3 = symptom which prevented normal everyday activity. Related = symptom assessed by the investigator as causally related to the vaccination. Grade 3 fever = fever > 39.0 °C.

The analysis was performed on the Total Vaccinated Cohort, which included all vaccinated subjects with at least 1 vaccine administration documented.

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 with at least 1 vaccine administration documented.

Adverse events of specific interest (AESI) were defined as AEs including autoimmune diseases and other mediated inflammatory disorders and assessed by the investigator as specific to the treatment administration. Potential immune-mediated diseases (pIMDs) are a subset of AEs that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune aetiology.

The analysis was performed on the Total Vaccinated Cohort, which included all vaccinated subjects with at least 1 vaccine administration documented.

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 with at least 1 vaccine administration documented.

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 with at least 1 vaccine administration documented.

Healthy male or female children, between 6 and 9 years of age (Y6-9) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 1 (F1) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 3 and 5 years of age (Y3-5) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 2 (F2) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 6 and 9 years of age (Y6-9) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 2 (F2) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 3 and 5 years of age (Y3-5) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 3 (F3) in the deltoid region of the arm, according to a 0-21 day schedule.

Healthy male or female children, between 6 and 9 years of age (Y6-9) at the time of first study vaccination, who intramuscularly received 2 doses of GSK2340272A vaccine formulation 3 (F3) in the deltoid region of the arm, according to a 0-21 day schedule.