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.

The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

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).

The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

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).

The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

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. This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1).

The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

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.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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).

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer <1:10 and a post-vaccination titer ≥1:40 or a pre-vaccination titer ≥1:10 and at least a four-fold increase in post-vaccination titer. The 2 flu strains assessed were A/Vietnam/1194/2004 (H5N1) and A/Indonesia/5/2005 (H5N1). This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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. This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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. This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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. This outcome only covers results from the adjuvanted groups.

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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. Note: No AESIs were reported during the entire study period.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects for whom data were available, on a subset of subjects enrolled for this study in Belgium.

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.

The analysis was based on the Total Vaccinated Cohort, which included all subjects with at least one documented dose, for whom data were available.

Assessed parameters were alanine aminotransferase (ALT), aspartate aminotransferase (AST), basophils (BAS), creatinine phosphokinase (CRPH), creatinine (CREA), eosinophils (EOS), haemoglobin (HEM), lactate dehydrogenase (LDE), lymphocytes (LYM), monocytes (MON), neutrophils (NEU), platelets (PLA), red blood cells (RBC), urea (URE) and white blood cells (WBC). Per parameter and range, it was assessed whether laboratory values of the subjects were below normal, normal or above the normal range. This outcome presents results for ALT, AST, BAS, CREA and CRPH.

The analysis was performed on the Total Vaccinated cohort, which included all vaccinated subjects for whom data were available.

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. Note: The study period was divided into 4 consecutive periods (Days 0-51, Days 52-180 [Month 6], Months 6-12 and Months 12-24), for which SAEs were collected.

The analysis was based on the Total Vaccinated Cohort, which included all vaccinated subjects for whom data were available.

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 based on the Total Vaccinated Cohort, which included all vaccinated subjects for whom data were available.

Assessed parameters were alanine aminotransferase (ALT), aspartate aminotransferase (AST), basophils (BAS), creatinine phosphokinase (CRPH), creatinine (CREA), eosinophils (EOS), haemoglobin (HEM), lactate dehydrogenase (LDE), lymphocytes (LYM), monocytes (MON), neutrophils (NEU), platelets (PLA), red blood cells (RBC), urea (URE) and white blood cells (WBC). Per parameter and range, it was assessed whether laboratory values of the subjects were below normal, normal or above the normal range. This outcome presents EOS, HEM, LDE, LYM and MON results.

The analysis was based on the Total Vaccinated Cohort, which included all vaccinated subjects for whom data were available.

The geometric mean was calculated for cluster of differentiation (CD) 4/CD 8 T-cells (per million) producing at least one cytokine beside either of the following: CD40 ligand [CD40L], interleukin-2 [IL-2], tumor necrosis factor-alpha [TNF-α] or interferon-gamma [IFN-γ].

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

The geometric mean was calculated for cluster of differentiation (CD) 4/CD 8 T-cells (per million) producing at least one cytokine beside either of the following: CD40 ligand [CD40L], interleukin-2 [IL-2], tumor necrosis factor-alpha [TNF-α] or interferon-gamma [IFN-γ].

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available

Assessed parameters were alanine aminotransferase (ALT), basophils (BAS), creatinine (CREA), eosinophils (EOS), haematocritis (HEM), lymphocytes (LYM), monocytes (MON), neutrophils (NEU), platelets (PLA), red blood cells (RBC) and white blood cells (WBC). Per parameter and range, it was assessed whether laboratory values of the subjects were below normal, normal or above the normal range. This outcome presents NEU, PLA, RBC, URE and WBC results.

The analysis was based on the Total Vaccinated Cohort, which included all vaccinated subjects for whom data were available.

The geometric mean was calculated for cluster of differentiation (CD) 4/CD 8 T-cells (per million) producing at least one cytokine beside either of the following: CD40 ligand [CD40L], interleukin-2 [IL-2], interferon gamma [INF-g] and tumor necrosis factor-alpha [TNF-α].

The analysis was performed on the According-To-Protocol (ATP) cohort for immunogenicity, which included all evaluable subjects for whom data concerning Immunogenicity outcomes variables were available and for whom assay results were available for antibodies against at least one study vaccine component after vaccination.

The geometric mean was calculated for cluster of differentiation (CD) 4/CD 8 T-cells (per million) producing at least one cytokine beside either of the following: CD40 ligand [CD40L], interleukin-2 [IL-2], tumor necrosis factor-alpha [TNF-α] or interferon-gamma [IFN-γ].

The analysis was performed on the According-To-Protocol cohort for persistence, which included all evaluable subjects who met all eligibility criteria, who complied with the protocol procedures during the entire study period and for whom assay results for antibodies against at least one study vaccine antigen component were available.

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 > 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

The analysis was based on the Total Vaccinated Cohort, which included all subjects with at least one documented dose, for whom data were available.