Dataset from Immune Response to a Hepatitis B Vaccine Challenge Dose in Healthy Subjects Who Received Primary Vaccination of GlaxoSmithKline Biologicals' Hepatitis B Vaccine, Approximately 20 Years Ago.

In this study, subjects who received primary neonatal vaccination with hepatitis B vaccine at 0, 1, 2, 12 months, 20 years ago in the 103860/272 primary study will be evaluated for immunological memory to hepatitis B vaccine via assessment of the response to a vaccine challenge dose.