Immunogenicity and Safety Study of Different Formulations of GlaxoSmithKline (GSK) Biologicals H7N1 Influenza Vaccine Administered to Adults 21 to 64 Years of Age

Inclusion Criteria:

- Male or female adults who are 21 to 64 years of age (inclusive) at the time of first
study vaccination.

- Written informed consent obtained from the subject.

- Subjects who the investigator believes can and will comply with the requirements of
the protocol.

- Healthy subjects as established by medical history and physical examination.

- 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.

- For subjects who undergo a screening visit, results of all safety laboratory tests
obtained at the screening visit must be within reference ranges. Results of any
repeat testing cannot be used to qualify a subject for enrollment.

- Female subjects of non-childbearing potential may be enrolled in the study.
Non-childbearing potential is defined as current tubal ligation, hysterectomy,
ovariectomy or post-menopause.

- Female subjects of childbearing potential may be enrolled in the study, if they

- have practiced adequate contraception for 30 days prior to vaccination, and

- have a negative pregnancy test on the day of vaccination, and

- agree to continue to practice adequate contraception until 2 months after the
last dose administered.

Exclusion Criteria:

- Presence or evidence of neurological or psychiatric diagnoses which, although stable,
are deemed by the investigator to render the potential subject unable/unlikely to
provide accurate safety reports.

- Presence or evidence of substance abuse.

- Diagnosed with cancer, or treatment for cancer within three years.

1. Persons with a history of cancer who are disease-free without treatment for
three years or more are eligible.

2. Persons with a history of histologically-confirmed basal cell carcinoma of the
skin successfully treated with local excision only are excepted and are
eligible, but other histologic types of skin cancer are exclusionary.

3. Women who are disease-free three years or more after treatment for breast cancer
and receiving long-term prophylaxis are eligible.

- Diagnosed with excessive daytime sleepiness (unintended sleep episodes during the day
present almost daily for at least one month), or narcolepsy.

- History of narcolepsy in subject's parent, sibling or child

- Presence of a temperature ≥ 38.0ºC (≥100.4ºF), or acute symptoms greater than "mild"
severity on the scheduled date of first vaccination.

NOTE: The subject may be vaccinated at a later date, provided symptoms have resolved, and
all other eligibility criteria continue to be satisfied.

- Any confirmed or suspected immunosuppressive or immunodeficient condition including
history of human immunodeficiency virus (HIV) infection.

- Receipt of systemic glucocorticoids within 30 days prior to the first dose of study
vaccine/placebo, or any other cytotoxic, immunosuppressive or immune-modifying drugs
within 6 months of first study vaccine/ placebo dose. Topical, intra-articularly
injected, or inhaled glucocorticoids, topical calcineurin inhibitors or imiquimod are
allowed.

- Any significant disorder of coagulation or treatment with warfarin derivatives or
heparin. Persons receiving individual doses of low molecular weight heparin outside
of 24 hours prior to vaccination are eligible. Persons receiving prophylactic
antiplatelet medications, e.g., low-dose aspirin, and without a clinically-apparent
bleeding tendency, are eligible.

- An acute evolving neurological disorder or Guillain Barré Syndrome within 42 days of
receipt of prior seasonal or pandemic influenza vaccine.

- Administration of an inactive vaccine within 14 days or of a live attenuated vaccine
within 30 days before the first dose of study vaccine/placebo.

- Planned administration of any vaccine other than the study vaccine/placebo before
blood sampling at the Day 42 visit.

- Previous administration of any H7 vaccine or physician-confirmed H7 disease.

- Use of any investigational or non-registered product other than the study vaccine
within 30 days preceding the first dose of study vaccine/placebo, or planned use
during the study period.

- Receipt of any immunoglobulins and/or any blood products within 90 days before the
first dose of study vaccine/placebo, or planned administration of any of these
products during the study period.

- Any known or suspected allergy to any constituent of influenza vaccines or component
used in the manufacturing process of the study vaccine including 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 before the first dose of study vaccine/placebo.

- Lactating or nursing women.

- Any condition which, in the opinion of the investigator, prevents the subject from
participating in the study.