Evaluation of the Long-term Persistence of Immunity to Hepatitis B, in Adolescents Vaccinated in Infancy With Engerix™-B Kinder

Inclusion Criteria

• Subject's parent(s)/guardians who, in the opinion of the investigator, can and will comply, with the requirements of the protocol.
• A male or female between, and including, 15 and 16 years of age at the time of the vaccination.
• Written informed consent obtained from the parent(s)/LAR(s) of the subject.
• Written informed assent obtained from the subject in addition to the informed consent signed by the parent(s)/LAR(s).
• Healthy subjects as established by medical history and clinical examination before entering into the study.
• Documented evidence of previous vaccination with three consecutive doses of Engerix™-B Kinder in Germany: with the first two doses received by 9 months of age and the third dose received by 18 months of age.
• 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:
• has practiced adequate contraception for 30 days prior to vaccination, and
• has a negative pregnancy test on the day of vaccination, and
• has agreed to continue adequate contraception during the entire treatment period and for 2 months after completion of the vaccination.

Exclusion Criteria

• Child in care.
• Use of any investigational or non-registered product 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 six months prior to the vaccine dose. For corticosteroids, this will mean prednisone ≥ 20 mg/day, or equivalent. Inhaled and topical steroids are allowed.
• Previous hepatitis B vaccination since administration of the third dose of Engerix™-B Kinder.
• History of hepatitis B disease.
• Administration of a vaccine not foreseen by the study protocol within the period starting 30 days before study vaccine dose, or planned administration during the study period.
• Concurrently participating in another clinical study, at any time during the study period, in which the subject has been or will be exposed to an investigational or a non-investigational vaccine/product.
• History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine.
• Any confirmed or suspected immunosuppressive or immunodeficient condition, based on medical history and physical examination.
• Acute disease and/or fever at the time of enrollment.
• Fever is defined as temperature ≥ 37.5°C for oral, axillary or tympanic route, or ≥ 38.0°C on rectal route. The preferred route for recording temperature in this study will be axillary.
• Subjects with a minor illness without fever may be enrolled at the discretion of the investigator.
• Administration of immunoglobulins and/or any blood products within the 3 months preceding the study vaccine dose or planned administration during the study period.
• Pregnant or lactating female.
• Female planning to become pregnant or planning to discontinue contraceptive precautions.