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

NCT01000324 · Status: COMPLETED · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 44

Last updated 2018-09-04

Study results available
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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.

Conditions

Interventions

PROCEDURE

Blood sampling

Blood sampling at Year 16, 17, 18, 19 and 20 and at the time of challenge dose administration and 14 days and one month after challenge dose administration (if challenge dose needed).

BIOLOGICAL

Engerix-B

Engerix-B will be administered to subjects who are not seroprotected against hepatitis B

BIOLOGICAL

Havrix

Havrix will be administered to subjects who are seronegative for anti-HAV antibodies

Sponsors & Collaborators

Principal Investigators

  • GSK Clinical Trials · GlaxoSmithKline

Study Design

Allocation
NA
Purpose
PREVENTION
Masking
NONE
Model
SINGLE_GROUP

Eligibility

Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2009-11-06
Primary Completion
2014-07-25
Completion
2014-07-25

Countries

  • Belgium

Study Locations

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Entities

Diseases
Companies

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01000324 on ClinicalTrials.gov