Woman and Man
- | Country :
- Thailand
- | organs : -
- | Specialty : -
Extract
This study will evaluate the immune response of healthy subjects who received neonatal vaccination course with GSK Biologicals' Engerix™-B vaccine, approximately 20 years ago. The presence of immune memory against hepatitis B surface antigen (HBsAg) in these subjects will be investigated by the administration of a challenge dose of hepatitis B vaccine and the comparison of their antibody concentration before and one month after vaccination. This protocol posting deals with objectives & outcome measures of the booster phase. No new subjects will be recruited during this booster phase of the study.
Inclusion criteria
- Hepatitis B