Dataset from Assess Long-term Persistence of Hepatitis B Antibodies & Immune Response to a Hepatitis B Vaccine (Engerix-B Kinder) Challenge in Children Aged 4-5 Years (Previously Primed & Boosted in the 1st 2 Years of Life With DTPa-HBV-IPV/Hib Vaccine)

The purpose of this study is to determine at 5 years of age the persistence of immunity to hepatitis B that was conferred by infant vaccination with Infanrix hexa™. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.