A Study for Evaluation of GSK Biologicals' Pandemic Influenza Vaccine

• Serum HI antibody titres [ Time Frame: Day -30, Day 42, Month 6, Month 12 ] [ Designated as safety issue: No ]
• Serum neutralising antibody titres [ Time Frame: Day -30, Day 42, Month 6, Month 12 ] [ Designated as safety issue: No ]
• Occurrence, intensity, and relationship to vaccination of solicited local and general signs and symptoms [ Time Frame: Day 0 - Day 6 after each vaccination ] [ Designated as safety issue: No ]
• Occurrence, intensity and relationship to vaccination of unsolicited adverse events [ Time Frame: Day 0 - Day 29 after vaccination, Day 0 - Day 20 after investigational vaccination ] [ Designated as safety issue: No ]
• Occurrence and relationship to vaccination of serious adverse events [ Time Frame: Day 0 - Month 6 ] [ Designated as safety issue: No ]
• Occurrence of adverse events of specific interest [ Time Frame: Day 0 - Month 12 ] [ Designated as safety issue: No ]

This observer-blind study is designed to evaluate the immune response and safety of pandemic influenza vaccine in the elderly population.

• Biological: GSK's candidate influenza vaccine 1562902A
  Intramuscular dose on Day 0 and Day 21
• Biological: FluarixTM
  Intramuscular dose on Day 42 or on Day -30, according to the vaccination schedule
• Biological: Placebo
  Intramuscular dose on Day 42 or on Day -30, according to the vaccination schedule

• Experimental: Group A
  Interventions:

  • Biological: GSK's candidate influenza vaccine 1562902A
  • Biological: FluarixTM
  • Biological: Placebo
• Experimental: Group B
  Interventions:

  • Biological: GSK's candidate influenza vaccine 1562902A
  • Biological: FluarixTM
  • Biological: Placebo

Inclusion Criteria:

• Male or female subjects aged 61 years or above at the time of the first study visit (Day -30).
• Female subjects of non-childbearing potential.
• Healthy subjects or subjects with well controlled chronic medical condition (at the discretion of the investigator).
• Written informed consent obtained from the subject.
• 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.
• Subjects who the investigator believes that they can and will comply with the requirements of the protocol should be enrolled in the study.

Exclusion Criteria:

• Previous administration of the licensed MF59-containing vaccines, e.g. Fluad™ or Addigrip™ or virosome-based influenza vaccines such as Inflexal V™, InfectoVac Flu™ or Invivac™ .
• Previous administration of the 2009 Southern Hemisphere or 2008-2009 Northern Hemisphere influenza vaccine.
• Previous administration of a pandemic influenza vaccine.
• Administration of licensed vaccines within 4 weeks prior to enrolment in this study.
• Planned administration of a vaccine not foreseen by the study protocol up to 30 days after the second vaccination with H5N1 vaccine.
• Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the first study vaccination.
• Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required).
• History of chronic alcohol consumption and/or drug abuse.
• History of hypersensitivity to vaccines.
• History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccines.
• Acute clinically significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests.
• Acute disease and/or fever at the time of enrolment.
• Serious chronic disease including any medically significant chronic pulmonary, cardiovascular, renal, neurological, psychiatric or metabolic disorder, as determined by medical history and physical examination..
• Administration of immunoglobulins and/or any blood products within the three months preceding the first study vaccination or during the study.
• Use of any investigational or non-registered product (drug or vaccine) other than the study vaccines 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.