Immunogenicity and Safety of GSK Biologicals' (Pre-) Pandemic Influenza Candidate Vaccine

Inclusion Criteria: * Japanese male and female adults 20 to 64 years of age at time of the first vaccination, inclusive. * Good general health as assessed 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. * Written informed consent obtained from the subject. * Comprehension of the study requirements, expressed availability for the required study period, and ability to attend scheduled visits. * 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: * Presence of significant acute or chronic, uncontrolled medical or psychiatric illness. * Presence or evidence of substance abuse or 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. * Diagnosed with cancer, or treatment for cancer within 3 years. * Presence of an axillary temperature \>= 37.5 °C, 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 within 1 month of study enrolment, or any other cytotoxic or imm…