Dataset from Antibody Persistence and Immune Memory Against the Hepatitis B Antigen in 11-12 Year Old Children, Previously Vaccinated With DTPa-HBV-IPV/Hib Vaccine in Study 217744/031

This study will evaluate the persistence of immunity to hepatitis B 10 to 11 years after vaccination with Infanrix hexa™ or Engerix™-B and also the ability to mount an immune response to the challenge dose of Engerix™-B.