Safety and Immunogenicity of a Paediatric Dose of Virosomal Hepatitis A Vaccine

Inclusion Criteria: Original study: * Males or females aged \>=12 months and 16 years of age at the time of the first vaccination. * Written informed consent obtained from the subject when applicable and from the parent/legal guardian of the subject. - Free of obvious health problems as established by medical history and/or clinical examination before entering the study. Follow up phase: * Subjects enrolled and randomized in the primary study and having received two doses of the study vaccine Exclusion Criteria: * Use of any investigational or non-registered drug or vaccine within 30 days preceding the first dose of study vaccine, or planned use during the study period and safety follow-up * Chronic administration (defined as more than 14 days) of immunosuppressants or other immune-modifying drugs within six months prior to the first vaccine dose. (For corticosteroids, this means prednisone, or equivalent, \>=0.5 mg/kg/day. Inhaled and topical steroids were allowed.) * Planned administration/administration of a vaccine not foreseen by the study protocol within 4 weeks prior to the first dose of study vaccine * Previous vaccination against hepatitis A * Seropositive for anti-HAV antibodies (\>=10 mIU/mL) * Any confirmed or suspected immunosuppressive or immunodeficient condition, including human immunodeficiency virus (HIV) infection * History of allergic disease or reactions likely to be exacerbated by any component of the vaccine. * Major congenital defects or serious chronic illness * Acute disease at the time of enrolment