Dataset from Evaluate the Anti-HBs Antibody Persistence, in Subjects Who Received GSK Biologicals' Preservative-free or Thiomersal-free Engerix™-B or Engerix™-B Containing Thiomersal, Approximately 5 to 6 Yrs Earlier

To evaluate the persistence of antibodies against hepatitis B, approximately 5 to 6 years after the first dose of the hepatitis B in the primary vaccination study.为评估乙型肝炎（hepatitis B）病毒抗体的持久性，本研究于基础免疫接种首剂乙型肝炎疫苗后约5至6年开展。