Antibody Persistence & Immune Memory in Healthy Adults Previously Vaccinated With Twinrix Adult

Summary

This study will evaluate the persistence of the immune response to HAV (Hepatitis A Virus) antigens and HBs (Hepatitis B surface) antigens in healthy adults previously vaccinated with GlaxoSmithKline (GSK) Biologicals' Twinrix Adult. The subjects will be invited for blood sampling 16, 17, 18, 19 and 20 years after vaccination to evaluate the antibody persistence. For subjects in whom low circulating antibodies are detected, the presence of immune memory against hepatitis A \& B antigens will be investigated by the administration of a challenge dose of the appropriate vaccine (Havrix and/or Engerix-B) at the next planned visit. No new subjects will be recruited during this study.

Timeline

Start

2009-11-06

Primary completion

2014-07-25

Completion

2014-07-25

Publications

• Agrawal A, Kolhapure S, Andani A, Ota MOC, Badur S, Karkada N, Mitra M. Long-Term Persistence of Antibody Response with Two Doses of Inactivated Hepatitis A Vaccine in Children. Infect Dis Ther. 2020 Dec;9(4):785-796. doi: 10.1007/s40121-020-00311-8. Epub 2020 Jul 24.

Drugs

Indications