At a glance
ClinicalIndex Comparison Record- ✓Prior participation in the primary study with combined hepatitis A/hepatitis B vaccine
None specified.
Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.
Long-Term Follow-up Study to Evaluate the Immune Persistence of GSK Biologicals' Combined Hepatitis A / Hepatitis B Vaccine in Healthy Children
In Brief
A Phase 3 clinical trial evaluating TWINRIX™ ADULT and Engerix TM for Hepatitis B and Hepatitis A. Completed, enrolled 178 participants across 1 site.
Detailed Summary
The aim of this study is to evaluate the long-term persistence of hepatitis A and B antibodies at Years 6, 7, 8, 9 and 10 after subjects received their first two doses primary vaccination schedule of combined hepatitis A/hepatitis B vaccine. This protocol posting deals with objectives \& outcome measures of the extension phase at year 6 through to 10. The Protocol Posting has been updated in order to comply with the FDA Amendment Act, Sep 2007.
Study Details
Timeline
Interventions
2 doses IM injection in primary study
If a subject has become seronegative for anti-HAV antibodies or lost anti-HBs seroprotection concentrations at the long-term blood sampling time point (i.e. Years 6, 7, 8, 9 or 10), he/ she will be offered an additional vaccine dose.