Assess Consistency of Immunogenicity of GlaxoSmithKline Biologicals' Pandemic Influenza Vaccine (GSK1562902A) in Adults

Study Overview
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Brief Summary
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The present study is designed to assess the lot-to-lot consistency of the immunogenicity of a GlaxoSmithKline Biologicals' pandemic influenza candidate vaccine (GSK1562902A) in adults aged between 18 and 60 years.

Detailed Description
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The protocol posting has been updated to reflect changes due to an amendment to the protocol (addition of an exclusion criterion). The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.

Official Title
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Assess the Consistency of the Immunogenicity of a GlaxoSmithKline Biologicals' Pandemic Influenza Vaccine (GSK1562902A) in Adults Aged Between 18 and 60 Years

Conditions
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Influenza, Influenza Vaccines

Intervention / Treatment
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* Biological: H5N1 adjuvanted split virus vaccine (A/Vietnam/1194/2004 strain)
* Biological: H5N1 non-adjuvanted split virus vaccine (A/Vietnam/1194/2004 strain)
* Biological: H5N1 adjuvanted split virus vaccine (A/Indonesia/05/2005 strain)


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subjects who the investigator believes that they can and will comply with the requirements of the protocol A male or female between, and including, 18 and 60 years of age at the time of the first vaccination. Written informed consent obtained from the subject. Healthy subjects as established by medical history and clinical examination before entering into the study. If the subject is female, she must be of non-childbearing potential; or, if of childbearing potential, she must practice adequate contraception for 30 days prior to vaccination, have a negative pregnancy test and continue such precautions for two months after completion of the vaccination series. Exclusion Criteria: Administration of any licensed vaccines within 2 weeks (for inactivated vaccines) or 4 weeks (for live vaccines) prior to enrolment in this study. Planned administration of a vaccine not foreseen by the study protocol during the following periods: from Day 0 up to Day 51, 2 weeks (for inactivated vaccines) or 4 weeks (for live vaccines) prior to Month 6; from Month 6 up to Month 6 + 30 days (or Month 6 + 51 days for the control groups). Previous vaccination with a pandemic candidate vaccine or a vaccine containing the same adjuvant as the study vaccine. Previous proven contact with H5N1 wild type virus (i.e. contact with an individual with laboratory-confirmed H5N1 infection, or contact with an animal (e.g. poultry) which died as a result of H5N1 infection). Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the first administration of the candidate vaccines. Any confirmed or suspected immunosuppressive or immunodeficient condition, or autoimmune diseases such as Guillain Barre Syndrome, based on medical history and physical examination (no laboratory testing required). History of hypersensitivity to vaccines. History of allergic disease or reactions likely to be exacerbated by any component of the vaccine. History of chronic alcohol consumption and/or drug abuse. Acute clinically significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests. Serious chronic disease including any medically significant chronic pulmonary, cardiovascular, renal, neurological, psychiatric or metabolic disorder, as determined by medical history and physical examination. Acute disease at the time of enrolment. Administration of immunoglobulins and/or any blood products within the 3 months preceding the first administration of the candidate vaccine or during the study. Lactating women. Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine(s) within 30 days prior to the first vaccination, or planned use during the study period. Any condition which, in the opinion of the investigator, prevents the subject from participation in the study.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: H5N1 Adjuvanted Group<br>Subjects received 2 doses of H5N1 adjuvanted split virus vaccine (lot 1, 2, 3 or 4) containing A/Vietnam/1194/2004 strain at Day 0 and Day 21 during Primary Phase. A subset of these subjects (Boosted sub-cohort) received a single dose of heterologous H5N1 adjuvanted vaccine containing A/Indonesia/05/2005 strain at Month 6 during Booster Phase. The remaining subjects (Non-Boosted sub-cohort) received a single booster dose at Month 12 or 36 after initial priming in study 111443 (NCT00652743). | Biological: H5N1 adjuvanted split virus vaccine (A/Vietnam/1194/2004 strain)<br>* Two doses of the GSK1562902A adjuvanted split virus vaccine, administered intramuscularly into the deltoid region of the non-dominant arm at Day 0 and Day 21.<br>Biological: H5N1 adjuvanted split virus vaccine (A/Indonesia/05/2005 strain)<br>* Booster administration at Month 6 (and a second booster dose 21 days later for the un-adjuvanted group only) with an adjuvanted split virus pandemic influenza candidate vaccine containing the strain A/Indonesia/5/2005.<br>|
| Active Comparator: H5N1 Un-adjuvanted Group<br>Subjects received 2 doses of a H5N1 non-adjuvanted split virus vaccine containing A/Vietnam/1194/2004 strain at Day 0 and Day 21 and two booster doses of heterologous H5N1 adjuvanted vaccine containing A/Indonesia/05/2005 strain at Month 6 and Month 6 + 21 days. | Biological: H5N1 non-adjuvanted split virus vaccine (A/Vietnam/1194/2004 strain)<br>* Two doses of the GSK1562902A non-adjuvanted split virus vaccine, administered intramuscularly into the deltoid region of the non-dominant arm at Day 0 and Day 21.<br>Biological: H5N1 adjuvanted split virus vaccine (A/Indonesia/05/2005 strain)<br>* Booster administration at Month 6 (and a second booster dose 21 days later for the un-adjuvanted group only) with an adjuvanted split virus pandemic influenza candidate vaccine containing the strain A/Indonesia/5/2005.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | Before vaccination (Day 0) | 
| Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | Within 21 days following 2-dose primary vaccination (at Day 42) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | Within 21 days following the first primary vaccination dose (Day 21) | 
| Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D) and at Month 6+42 days (M6+42D) | 
| Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D) and at Month 6+42 days (M6+42D) and at Month 12 (M12) | 
| Titers for Serum Neutralizing (SN) Antibodies Against 2 Strains of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:28. | Before vaccination at Day 0 (D0) and within 21 days following 2-dose primary vaccination at Day 42 (D42) | 
| Titers for Serum Neutralization (SN) Antibodies Against 2 Strains of Influenza Disease | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D) and at Month 6+42 days (M6+42D) | 
| Titers for Serum Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease in Adults Who Had Not Received the Booster Dose at Month 6 | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | At Day 0, at Day 21, at Day 42, at Month 6 and at Month 12 | 
| Titers for Serum Neutralization (SN) Antibodies Against 2 Strains of Influenza Disease in Adults Who Had Not Received the Booster Dose at Month 6 | Titers are presented as geometric mean titers (GMTs). The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). The reference seropositivity cut-off value was ≥ 1:10. | At Month 12 | 
| Number of Seroconverted Subjects for HI Antibodies Against 2 Strains of Influenza Disease | Seroconversion was defined as: for initially seronegative subjects, antibody titer greater than or equal to ≥ 1:40 after vaccination; and for initially seropositive subjects, antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | At Day 21 (D21) and at Day 42 (D42) | 
| Number of Seroconverted Subjects for HI Antibodies Against 2 Strains of Influenza Disease | Seroconversion was defined as: for initially seronegative subjects, antibody titer greater than or equal to ≥ 1:40 after vaccination; and for initially seropositive subjects, antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D) and at Month 6+42 days (M6+42D) | 
| Number of Seroconverted Subjects for HI Antibodies Against 2 Strains of Influenza Disease for Adults Who Received the Booster Dose at Month 6 - Booster Phase | Seroconversion was defined as: for initially seronegative subjects, antibody titer greater than or equal to ≥ 1:40 after vaccination; and for initially seropositive subjects, antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Following booster vaccination at Month 6 +21 days (M6+21D) and Month 6 +42 days (M6+42D) | 
| Number of Seroconverted Subjects for HI Antibodies Against 2 Strains of Influenza Disease for Adults Who Received the Booster Dose at Month 6 - Booster Phase | Seroconversion was defined as: for initially seronegative subjects, antibody titer greater than or equal to ≥ 1:40 after vaccination; and for initially seropositive subjects, antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | At Month 12 | 
| Number of Seroconverted Subjects for Neutralizing Antibodies Against 2 Strains of Influenza Disease | Seroconversion was defined as: antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Within 21 days following 2-dose primary vaccination at Day 42 | 
| Number of Seroconverted Subjects for Neutralizing Antibodies Against 2 Strains of Influenza Disease - Booster Phase | Seroconversion was defined as: for initially seronegative subjects, antibody titer ≥ 1:56 after vaccination; and for initially seropositive subjects, antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. | Following booster vaccination at Month 6+21 days (M6+21D) and at Month 6+42 days (M6+42D) | 
| Number of Seroconverted Subjects for HI Antibodies Against 2 Strains of Influenza Disease for Adults Who Have Not Received Booster at Month 6 | Seroconversion defined as: for initially seronegative subjects, antibody titer ≥ 1:40 after vaccination; and for initially seropositive subjects, antibody titer after vaccination ≥ 4 fold the pre-booster antibody titer. | At Day 21, Day 42, Month 6 and Month 12 following primary vaccination | 
| Number of Seroconverted Subjects for Neutralizing Antibodies Against 2 Strains of Influenza Disease for Subjects Not Boosted at Month 6 | Seroconversion was defined as: for initially seronegative subjects, antibody titer ≥ 1:56 after vaccination; and for initially seropositive subjects, antibody titer after vaccination ≥ 4 fold the pre-vaccination antibody titer. | At Month 12 | 
| Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | The seroconversion factor (SCF) was defined as the fold increase in serum Hemagglutination Inhibition (HI) geometric mean titers (GMTs) post vaccination compared to Day 0. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | At day 21 and Day 42 | 
| Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | The seroconversion factor (SCF) was defined as the fold increase in serum Hemagglutination Inhibition (HI) geometric mean titers (GMTs) post vaccination compared to Day 0. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Before booster vaccination at Month 6 (M6) and within 21 days following each booster dose: At Month 6 + 21 days (M6+21D) and, for H5N1 Un-adjuvanted Group only, at Month 6 + 42 days (M6+42D) | 
| Booster Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | The seroconversion factor (SCF) was defined as the fold increase in serum Hemagglutination Inhibition (HI) geometric mean titers (GMTs) post vaccination compared to Day 0. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Within 21 days following each booster dose: At Month 6 + 21 days (M6+21D) and, for H5N1 Un-adjuvanted Group only, at Month 6 + 42 days (M6+42D) | 
| Booster Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease | The seroconversion factor (SCF) was defined as the fold increase in serum Hemagglutination Inhibition (HI) geometric mean titers (GMTs) post vaccination compared to Day 0. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | At Month 12 | 
| Seroconversion Factor for Hemagglutination Inhibition (HI) Antibodies Against 2 Strains of Influenza Disease for Subjects Not Boosted at Month 6 | The seroconversion factor (SCF) was defined as the fold increase in serum Hemagglutination Inhibition (HI) geometric mean titers (GMTs) post vaccination compared to Day 0. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | At Day 21, at Day 42, at Month 6 and at Month 12 | 
| Number of Subjects Seroprotected Against 2 Strains of Influenza Disease | A seroprotected subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:40. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Before primary vaccination at Day 0 and within 21 days following each primary vaccination dose at Day 21 and at Day 42. | 
| Number of Subjects Seroprotected Against 2 Strains of Influenza Disease | A seroprotected subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:40. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D) and at Month 6+42 days (M6+42D) | 
| Number of Seroprotected Subjects Against 2 Strains of Influenza Disease | A seroprotected subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:40. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D), at Month 6+42 days (M6+42D) and at Month 12 (M12) | 
| Number of Subjects Seroprotected Against 2 Strains of Influenza Disease for Subjects Not Boosted at Month 6 | A seroprotected subject was defined as a vaccinated subject with serum Hemagglutination Inhibition (HI) titer ≥ 1:40. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). | At Day 0, Day 21, Day 42, Month 6 and Month 12 | 
| Frequency of Influenza-specific Cluster of Differentiation 4+ (CD4+) T Cells Expressing at Least 2 Markers Among the Analyzed Cytokines Upon in Vitro Stimulation | The analyzed cytokines were CD 40 Ligand (CD40L), Interleukin 2 (IL-2), Tumor Necrosis Factor-α (TNF-α) and Interferon-γ (IFN-γ). The stimulating antigen used was A/Vietnam/1194/2004. | Within 21 days of each primary vaccine dose: at Day 21 and at Day 42 | 
| Frequency of Influenza-specific Cluster of Differentiation 8+ (CD8+) T Cells Expressing at Least 2 Markers Among the Analyzed Cytokines Upon in Vitro Stimulation | The analyzed cytokines were CD 40 Ligand (CD40L), Interleukin 2 (IL-2), Tumor Necrosis Factor-α (TNF-α) and Interferon-γ (IFN-γ). The stimulating antigen used was A/Vietnam/1194/2004. | Within 21 days of each primary vaccine dose: at Day 21 and at Day 42 | 
| Frequency of Influenza-specific Cluster of Differentiation 4+ (CD4+) T Cells Expressing at Least 2 Markers Among the Analyzed Cytokines Upon in Vitro Stimulation | The analyzed cytokines were CD 40 Ligand (CD40L), Interleukin 2 (IL-2), Tumor Necrosis Factor-α (TNF-α) and Interferon-γ (IFN-γ). The stimulating antigen used was A/Vietnam/1194/2004. | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D), at Month 6+42 days (M6+42D) and at Month 12 (M12) | 
| Frequency of Influenza-specific Cluster of Differentiation 8+ (CD8+) T Cells Expressing at Least 2 Markers Among the Analyzed Cytokines Upon in Vitro Stimulation | The analyzed cytokines were CD40 Ligand (CD40L), Interleukin 2 (IL-2), Tumor Necrosis Factor-α (TNF-α) and Interferon-γ (IFN-γ). The stimulating antigen used was A/Vietnam/1194/2004. | Before booster vaccination at Month 6 (M6) and following booster vaccination at Month 6+21 days (M6+21D), at Month 6+42 days (M6+42D) and at Month 12 (M12) | 
| Frequency of Influenza-specific Cluster of Differentiation 4+ (CD4+) T Cells Expressing at Least 2 Markers Among the Analyzed Cytokines Upon in Vitro Stimulation for Subjects Not Boosted at Month 6 | The analyzed cytokines were CD 40 Ligand (CD40L), Interleukin 2 (IL-2), Tumor Necrosis Factor-α (TNF-α) and Interferon-γ (IFN-γ). The stimulating antigen used was A/Vietnam/1194/2004. | At Month 6 and Month 12 | 
| Frequency of Influenza-specific Cluster of Differentiation 8+ (CD8+) T Cells Expressing at Least 2 Markers Among the Analyzed Cytokines Upon in Vitro Stimulation for Subjects Not Boosted at Month 6 | The analyzed cytokines were CD 40 Ligand (CD40L), Interleukin 2 (IL-2), Tumor Necrosis Factor-α (TNF-α) and Interferon-γ (IFN-γ). The stimulating antigen used was A/Vietnam/1194/2004. | At Month 6 and at Month 12 | 
| Number of Subjects With Any and Grade 3 Solicited Local Symptoms | Assessed solicited local symptoms were ecchymosis, induration, pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 ecchymosis/induration/redness/swelling = ecchymosis/induration/redness/swelling spreading beyond 100 millimeters (mm) of injection site. | During the 7-days (Days 0-6) post-primary vaccination period following each dose and overall | 
| Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms | Assessed solicited general symptoms were arthralgia, fatigue, fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, myalgia, shivering and sweating. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever higher than (>) 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination. | During the 7-days (Days 0-6) post-primary vaccination period following each dose and overall | 
| Number of Subjects With Any and Grade 3 Solicited Local Symptoms - Booster Phase | Assessed solicited local symptoms were ecchymosis, induration, pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal activity. Grade 3 ecchymosis/induration/redness/swelling = ecchymosis/induration/redness/swelling spreading beyond 100 millimeters (mm) of injection site. | During the 7-days (Days 0-6) post-booster vaccination period | 
| Number of Subjects With Any, Grade 3 and Related Solicited General Symptoms - Booster Phase | Assessed solicited general symptoms were arthralgia, fatigue, fever [defined as axillary temperature equal to or above (≥) 37.5 degrees Celsius (°C)], headache, myalgia, shivering and sweating. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever higher than (>) 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination. | During the 7-days (Days 0-6) post-booster vaccination period | 
| Number of Subjects With Any Unsolicited Adverse Events (AEs) | 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. | During the primary phase (from Day 0 to Month 6) | 
| Number of Subjects With Any Unsolicited Adverse Events (AEs) | 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. | During the booster phase (from Month 6 to Month 12) | 
| Number of Subjects With Serious Adverse Events (SAEs). | 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. | During the primary phase (from Day 0 to Month 6) | 
| Number of Subjects With Serious Adverse Events (SAEs). | 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. | During the booster phase (from Month 6 to Month 12) | 
| Number of Subjects With Serious Adverse Events (SAEs) for Subjects Not Boosted at Month 6 | This group consists of the remaining subjects from the GSK1562902A Pooled Group who received a single dose of H5N1 vaccine at Month 12 or 36. | From Month 6 to Month 12 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Influenza, Influenza Vaccine