Immunogenicity and safety study of GlaxoSmithKline (GSK) Biologicals' Influenza Vaccine, Fluarix®/Influsplit SSW® (2013/2014 season), in adults 18 years of age and older

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

• A male or female aged 18 years or above at the time of vaccination.
• Written informed consent obtained from the subject.
• Healthy subjects or subjects with well-controlled chronic diseases as established by medical history and clinical examination before entering the study.
• Female subjects of non-childbearing potential may be enrolled in the study.

Non-childbearing potential is defined as pre-menarche, current tubal ligation, hysterectomy, ovariectomy or post-menopause.

• Female subjects of childbearing potential may be enrolled in the study, if the subject:

Participation in previous year’s Fluarix registration study (116663).

• Use of any investigational or non-registered product (drug or vaccine) other than the study vaccine within 30 days preceding the dose of study vaccine, or planned use during the study period.
• Chronic administration of immunosuppressants or other immune-modifying drugs within the six months prior to vaccination. Inhaled and topical steroids are allowed.
• Any administration of a long-acting immune-modifying drug within 6 months before study start, or planned administration during the study period.
• Administration of immunoglobulins and/or any blood products within the three months preceding the administration of the study vaccine or planned administration during the study period.
• Administration of an influenza vaccine within the twelve months preceding the study vaccination.
• Receipt of a vaccine other than the study vaccine within 30 days before study vaccination and/or plan to receive any vaccine other than the study vaccine during the entire study period.
• Clinically or virologically confirmed influenza infection within the six months preceding the study vaccination.
• Acute disease and/or fever at the time of enrollment.

Subjects with a minor illness (such as mild diarrhoea, mild upper respiratory infection) without fever may be enrolled at the discretion of the investigator.

• Acute, clinically significant pulmonary, cardiovascular, hepatic or renal functional abnormality, as determined by physical examination or laboratory screening tests.
• Chronic underlying disease (such as cancer, chronic obstructive pulmonary disease under oxygen therapy, insulin-dependent diabetes mellitus), not stabilized or clinically serious.
• History of chronic alcohol consumption and/or drug abuse.
• Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination (no laboratory testing required).
• History of Guillain-Barré syndrome.
• History of allergic disease or reactions likely to be exacerbated by any component of the vaccine including latex.
• Anaphylaxis following the administration of vaccine(s).
• Pregnant or lactating female.
• Female planning to become pregnant or planning to discontinue contraceptive precautions.
• Any condition which, in the opinion of the investigator, prevents the subject from participating in the study or would make intramuscular injection unsafe.