Immunogenicity & Safety of GSK's Avian Flu Vaccine 1557484A Given to Adults Aged ≥18 Years

Study Overview
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Brief Summary
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The purpose of this study is to determine whether GSK's avian flu vaccine GSK 1557484A is immunogenic and safe when given to adults aged >=18 years. This Protocol Posting has been updated following Amendments 1-3 of the Protocol, Dec 2009. The impacted sections are study design and outcome measures.

Detailed Description
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All subjects will receive 3 doses of study vaccine, including 2 doses of active vaccine and 1 dose of placebo. All subjects will attend formal study center visits for safety and immunogenicity assessments on Days 0, 10, 42, 182, 192, 224, 549, 559, 591, and 729. A telephone contact to assess safety will be made at Day 364 and Day 909.

Official Title
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A Trial to Evaluate the Safety and Immunogenicity of Monovalent H5N1 Vaccine in Adults >=18 Yrs of Age

Conditions
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Influenza

Intervention / Treatment
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* Biological: A/turkey H5N1 vaccine
* Biological: Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)
* Biological: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: A male or female 18 years of age or older at the time of the first vaccination. Written informed consent obtained from the subject. Stable health status as defined by absence of a health event satisfying the definition of a serious adverse event, or a change in an ongoing drug therapy due to therapeutic failure or symptoms of drug toxicity, within 1 month prior to enrollment. Access to a consistent means of telephone contact, which may be either in the home or at the workplace, land line or mobile, but NOT a pay phone or other multiple-user device. Comprehension of the study requirements, expressed availability for the required study period, and ability to attend scheduled visits. Subjects who the investigator believes can and will comply with the requirements of the protocol Exclusion Criteria: Presence of evidence of substance abuse or of neurological or psychiatric diagnoses which, even if clinically stable, are deemed by the investigator to render the potential subject unable/unlikely to provide accurate safety reports. Diagnosed with cancer, or treatment for cancer, within 3 years. Persons with a history of cancer who are disease-free without treatment for 3 years or more are eligible. Persons with a history of histologically-confirmed basal cell carcinoma of the skin successfully treated with local excision only are excepted and may enroll within 3 years of diagnosis, but other histologic types of skin cancer require a 3 year untreated and disease-free window as above. Women who are disease-free 3 years or more after treatment for breast cancer and receiving long-term prophylactic tamoxifen are excepted and may enroll. Presence of an oral temperature ≥ 37.8ºC, or acute symptoms greater than mild severity on the scheduled date of first vaccination. Any confirmed or suspected immunosuppressive or immunodeficient condition including history of human immunodeficiency virus (HIV) infection. Receipt of systemic glucocorticoids (prednisone >= 10 mg/day for more than 14 consecutive days) within 1 month prior to study enrollment, or any other cytotoxic or immunosuppressive drug within 6 months of study enrollment. Any significant disorder of coagulation or treatment with Coumadin derivatives or heparin. Administration of any vaccines within 30 days before the first study vaccine dose. Previous administration of any H5N1 vaccine. Use of any investigational or non-registered product (drug or vaccine) or planned participation in another investigational study within 30 days prior to study enrollment, or during the 18 months following the first test article dose. Use of any investigational or non-registered product with immunosuppressive properties is exclusionary at any time during the trial. Receipt of any immunoglobulins and/or any blood products within 6 months of study enrollment or planned administration of any of these products during the study period. Any known or suspected allergy to any constituent of influenza vaccines (including egg proteins or mercurial preservatives); a history of anaphylactic-type reaction to consumption of eggs; or a history of severe adverse reaction to a previous influenza vaccine. Known pregnancy or a positive urine beta-human chorionic gonadotropin (β-hCG) test result prior to vaccination. Lactating or nursing. Women of child bearing potential who lack a history of reliable contraceptive practices. The provision of this history does NOT replace the requirement to perform, and obtain negative results in pregnancy urine tests prior to treatments. Known receipt of analgesic or antipyretic medication with the specific intent of prophylaxis of vaccine reactogenicity on the day of first or any treatment. Subjects on stable chronic regimens of potentially analgesic or anti-pyretic medications for pre-existing diagnoses are not required to discontinue them (to do so would represent evaluation of combined vaccine reactogenicity AND treatment withdrawal - which is not the intent of the protocol).

Ages Eligible for Study
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Minimum Age: 18 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: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: A/Indonesia primed-A/turkey Influenza (H5N1)-F1-Placebo Group<br>Healthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 1 at Day 0 followed by one booster dose of A/turkey H5N1 vaccine formulation 1 at Day 182 and one dose of placebo (phosphate buffered saline, PBS) at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and Placebo vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, A/turkey H5N1 vaccine was administered intramuscularly in the deltoid region of the dominant arm. | Biological: A/turkey H5N1 vaccine<br>* Administered as an intramuscular (IM) injection<br>Biological: Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)<br>* Administered as an intramuscular (IM) injection<br>Biological: Placebo<br>* Administered as an intramuscular (IM) injection<br>|
| Experimental: A/Indonesia primed-A/turkey Influenza (H5N1)-F2-Placebo Group<br>Healthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 2 at Day 0 followed by one booster dose of A/turkey H5N1 vaccine formulation 2 at Day 182 and one dose of placebo (phosphate buffered saline, PBS) at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and Placebo vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, A/turkey H5N1 vaccine was administered intramuscularly in the deltoid region of the dominant arm. | Biological: A/turkey H5N1 vaccine<br>* Administered as an intramuscular (IM) injection<br>Biological: Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)<br>* Administered as an intramuscular (IM) injection<br>Biological: Placebo<br>* Administered as an intramuscular (IM) injection<br>|
| Experimental: A/Indonesia primed-A/turkey Influenza (H5N1)-F3-Placebo Group<br>Healthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 3 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 3 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm. | Biological: A/turkey H5N1 vaccine<br>* Administered as an intramuscular (IM) injection<br>Biological: Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)<br>* Administered as an intramuscular (IM) injection<br>Biological: Placebo<br>* Administered as an intramuscular (IM) injection<br>|
| Experimental: A/Indonesia primed-Placebo-A/turkey Influenza (H5N1)-F1-Group<br>Healthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) vaccine formulation 1 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 1 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm. | Biological: A/turkey H5N1 vaccine<br>* Administered as an intramuscular (IM) injection<br>Biological: Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)<br>* Administered as an intramuscular (IM) injection<br>Biological: Placebo<br>* Administered as an intramuscular (IM) injection<br>|
| Experimental: A/Indonesia primed-Placebo-A/turkey Influenza (H5N1)-F4-Group<br>Healthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 4 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 4 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm. | Biological: A/turkey H5N1 vaccine<br>* Administered as an intramuscular (IM) injection<br>Biological: Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)<br>* Administered as an intramuscular (IM) injection<br>Biological: Placebo<br>* Administered as an intramuscular (IM) injection<br>|
| Experimental: A/Indonesia primed-Placebo-A/turkey Influenza (H5N1)-F2-Group<br>Healthy subjects aged 18 years of age or older at the time of enrolment were primed with one dose of Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) formulation 2 at Day 0, one dose of placebo (phosphate buffered saline, PBS) at Day 182 followed by one booster dose of A/turkey H5N1 vaccine formulation 2 at Day 549. Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia) and A/turkey H5N1 vaccines were administered intramuscularly in the deltoid region of the non-dominant arm while, Placebo vaccine was administered intramuscularly in the deltoid region of the dominant arm. | Biological: A/turkey H5N1 vaccine<br>* Administered as an intramuscular (IM) injection<br>Biological: Influenza A (H5N1) Virus Monovalent Vaccine, Adjuvanted (A/Indonesia)<br>* Administered as an intramuscular (IM) injection<br>Biological: Placebo<br>* Administered as an intramuscular (IM) injection<br>|
| Placebo Comparator: Naïve Placebo-A/turkey Influenza (H5N1)-F3-Group<br>Healthy subjects aged 18 years of age or older at the time of vaccination received one dose of placebo (phosphate buffered saline, PBS) at Day 0 followed by two doses of A/turkey H5N1 vaccine formulation 3, one dose administered at Day 182 and the other at Day 549. Placebo vaccine and one dose of A/turkey H5N1 vaccine (Day 549) was administered intramuscularly in the deltoid region of the non-dominant arm while the other dose of A/turkey H5N1 vaccine (Day 182) was administered intramuscularly in the deltoid region of the dominant arm. | Biological: A/turkey H5N1 vaccine<br>* Administered as an intramuscular (IM) injection<br>Biological: Placebo<br>* Administered as an intramuscular (IM) injection<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. Pre-vaccination for this outcome measure corresponds to Day 549. This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Day 559 | 
| Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. Pre-vaccination for this outcome measure corresponds to Day 182. This outcome concerns solely subjects in the Naïve Placebo-A/turkey H5N1-Formulation 3 Group | At Day 192 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey) Strain. | HI antibody titers against the A/turkey virus strain were expressed as geometric mean titers (GMTs). This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Days 549 and 559 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey) Strain. | HI antibody titers against the A/turkey virus strain were expressed as geometric mean titers (GMTs). This outcome concerns solely subjects in the Naïve Placebo-A/turkey H5N1-Formulation 3 Group. | At Days 182 and 192 | 
| Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Days 549 and 559 | 
| Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome concerns solely subjects in the Naïve Placebo-A/turkey H5N1-Formulation 3 Group. | At Days 182 and 192 | 
| Number of Subjects With Solicited Local Symptoms | Assessed solicited local symptoms were pain, redness and swelling. Any was defined as an occurrence of the specified solicited local symptom regardless of its intensity. | Within the 7-day (Days 0-6) post vaccination periods | 
| Number of Subjects With Solicited General Symptoms | Solicited general symptoms assessed were fatigue, headache, joint pain at other locations (joint pain), muscle aches, shivering, sweating and fever. Any was defined as an occurrence of the specified solicited general symptom, irrespective of its intensity or relationship to vaccination. Any fever was defined as oral temperature higher than or equal to (≥) 38.0 degrees Celsius (°C). | Within the 7-day (Days 0-6) post vaccination periods | 
| Number of Subjects With Medically-attended Adverse Events (MAEs) | MAEs were defined as adverse events with medically-attended visits that were not routine visits for physical examination or vaccination, such as visits for hospitalization, an emergency room visit, or an otherwise unscheduled visit to or from medical personnel (medical doctor) for any reason. Any was defined as any occurrence of MAE(s). | From Day 0 to Day 909 | 
| Number of Subjects With Unsolicited Adverse Events (AEs) | An unsolicited AE was defined as an untoward medical occurrence in a patient or clinical investigation subject, temporally associated with 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 any occurrence of an unsolicited AE in a subject, regardless of intensity grade or relation to vaccination. | Within the 43-day (Days 0-42) post-vaccination periods | 
| Number of Subjects With Serious Adverse Events (SAEs) | A SAE was defined as any untoward medical occurrence that: resulted in death, was life threatening, required hospitalization or prolongation of hospitalization, resulted in disability/incapacity or was a congenital anomaly/birth defect in the offspring of a study subject. Any was defined as an occurrence of an SAE, regardless its relationship to vaccination. | From Day 0 to Day 909 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. Pre-vaccination for this outcome measure corresponds to Day 182. This outcome measure solely concerns subjects in the Naïve Placebo-A/turkey H5N1-Formulation 3 Group. | At Day 192 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey Virus Strain. | HI antibody titers against the A/turkey virus strain were expressed as geometric mean titers (GMTs). This outcome measure solely concerns subjects in the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo and Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo groups. | At Days 182 and 192 | 
| Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome measure solely concerns subjects in the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo and Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo groups. | At Days 182 and 192 | 
| Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome measure solely concerns subjects in the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo, Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo, and Naïve Placebo-A/turkey H5N1-Formulation 3 groups. | At Day 224 | 
| Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Day 591 | 
| Geometric Mean Fold Rise (GMFR) as Regards Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain | GMFR was defined as the geometric mean of the within-subject ratios of the post-vaccination reciprocal HI titer to the baseline reciprocal HI titer. Baseline for this outcome measure corresponds to Day 182. This outcome measure solely concerns subjects in the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo, Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo, and Naïve Placebo-A/turkey H5N1-Formulation 3 groups. | At Days 192 and 224 | 
| Geometric Mean Fold Rise (GMFR) as Regards Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain | GMFR was defined as the geometric mean of the within-subject ratios of the post-vaccination reciprocal HI titer to the baseline reciprocal HI titer. Baseline for this outcome measure corresponds to Day 549. This outcome measure solely concerns subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 and Naïve Placebo-A/turkey H5N1-Formulation 3 groups. | At Day 559 | 
| Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. Pre-vaccination for this outcome measure corresponds to Day 549. This outcome concerns solely subjects in the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Day 591 | 
| Number of Seroconverted Subjects for Haemagglutination Inhibition (HI) Antibodies Against the A/Turkey/Turkey/1/2005 (A/Turkey) Virus Strain. | A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. Pre-vaccination for this outcome measure corresponds to Day 182. This outcome measure solely concerns subjects in the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo, Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo, and Naïve Placebo-A/turkey H5N1-Formulation 3 groups. | At Day 224 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey) Strain. | HI antibody titers against the A/turkey virus strain were expressed as geometric mean titers (GMTs). This outcome measure concerns solely the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo and Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo groups. | At Days 0, 182,192, 224, 549 and 729 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey) Strain. | HI antibody titers against the A/turkey virus strain were expressed as geometric mean titers (GMTs). This outcome measure concerns solely the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4, and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Days 0, 182, 549, 559, 591 and 729 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Turkey/Turkey/1/2005 (A/Turkey) Strain. | HI antibody titers against the A/turkey virus strain were expressed as geometric mean titers (GMTs). This outcome measure concerns solely the Naïve Placebo-A/turkey H5N1-Formulation 3 Group. | At Days 0, 182, 192, 224, 549, 559, 591 and 729 | 
| Number of Subjects Seroprotected for HI Antibodies Against the A/Turkey/Turkey/1/2005 Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome measure concerns solely the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo and Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo groups. | At Days 0, 182,192, 224, 549 and 729 | 
| Number of Subjects Seroprotected for HI Antibodies Against the A/Turkey/Turkey/1/2005 Virus Strain | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome measure concerns solely the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4, and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Days 0, 182, 549, 559, 591 and 729 | 
| Number of Subjects Seroprotected for HI Antibodies Against the A/Turkey/Turkey/1/2005 Virus Strain | A seroprotected subject was defined as a vaccinated subject with HI antibody titers against the A/turkey virus strain greater than or equal to (≥) 1:40. This outcome measure concerns solely the Naïve Placebo-A/turkey H5N1-Formulation 3 Group. | At Days 0, 182, 192, 224, 549, 559, 591 and 729 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Indonesia/5/05 (A/Indo) Virus Strain. | HI antibody titers against the A/Indo virus strain were expressed as geometric mean titers (GMTs). This outcome measure solely concerns the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo and Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo groups. | At Days 0, 10, 42, 182 and 549 | 
| Haemagglutination Inhibition (HI) Antibody Titers Against the A/Indonesia/5/05 (A/Indo) Virus Strain. | HI antibody titers against the A/Indo virus strain were expressed as geometric mean titers (GMTs). This outcome measure solely concerns the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2, and Naïve Placebo-A/turkey H5N1-Formulation 3 groups. | At Days 0, 10, 42, 182, 549 and 559 | 
| Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against A/Indonesia/5/05 (A/Indo) Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody reciprocal titers against the A/Indo virus strain greater than or equal to (≥) 1:40. This outcome measure solely concerns the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo and Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo groups. | At Day 0, Day 10, Day 42, Day 182 and Day 549 | 
| Number of Seroprotected Subjects for Haemagglutination Inhibition (HI) Antibodies Against A/Indonesia/5/05 (A/Indo) Virus Strain. | A seroprotected subject was defined as a vaccinated subject with HI antibody reciprocal titers against the A/Indo virus strain greater than or equal to (≥) 1:40. This outcome measure solely concerns the Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2, and Naïve Placebo-A/turkey H5N1-Formulation 3 groups. | At Day 0, Day 10, Day 42, Day 182, Day 549, and Day 559 | 
| Number of Seroconverted Subjects for HI Antibodies Against the A/Indo Virus Strain. | A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. Pre-vaccination for this outcome measure corresponds to Day 0. This outcome measure only concerns the Pumarix Primed-A/turkey H5N1-Formulation 1-Placebo, Pumarix Primed-A/turkey H5N1-Formulation 2-Placebo, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 3, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 1, Pumarix Primed-Placebo-A/turkey H5N1-Formulation 4 and Pumarix Primed-Placebo-A/turkey H5N1-Formulation 2 groups. | At Days 10 and 42 | 
| Number of Seroconverted Subjects for HI Antibodies Against the A/Indo Virus Strain. | A seroconverted subject was defined as a vaccinated subject who had either a pre-vaccination titer less than (<) 1:10 and a post-vaccination reciprocal titer greater than or equal to (≥) 1:40 or a pre-vaccination reciprocal titer ≥ 1:10 and at least a 4-fold increase in post-vaccination titer. This outcome measure only concerns the Naïve Placebo-A/turkey H5N1-Formulation 3 Group, for whom the pre-vaccination time point corresponds to the Day 192 time point. | At Days 192 and 224 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Influenza, H5N1, Avian, Vaccines, Safety, Immunogenicity, Pandemic, Human