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Updated: Oct 13, 2026

Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
Published on: February 1, 2017
[Prevention of the horizontal transmission of hepatitis B in children]
1Istituto di Discipline Pediatriche, I Cattedra di Puericultura dell'Università degli Studi di Torino, Italia.
Insights
The Hevac B vaccine effectively protected most children against Hepatitis B virus infection. Booster doses improved antibody levels in some non-responders, highlighting vaccination
Area of Science:
- Immunology
- Virology
- Pediatrics
Context:
- Hepatitis B virus (HBV) poses a significant global health risk.
- Active immunization through vaccination is the primary strategy for HBV prevention.
- Children cohabiting with chronic HBV carriers are at high risk.
Purpose:
- To evaluate the efficacy of the Hevac B vaccine in children exposed to chronic Hepatitis B virus carriers.
- To assess seroconversion rates and immune responses following vaccination.
- To investigate the impact of supplementary and booster doses on non-responders.
Summary:
- Sixty-one children received three doses of Hevac B vaccine.
- 57 out of 61 children achieved protective antibody titers post-vaccination.
- Four children, including one with T-lymphocyte alterations, did not achieve protective levels initially.
- Supplementary and booster vaccinations were administered to non-responders, with two boys remaining without seroconversion.
Impact:
- The Hevac B vaccine demonstrates high efficacy in preventing Hepatitis B virus infection in at-risk children.
- Understanding non-response is crucial for optimizing vaccination strategies.
- Further investigation into immune response variations may refine vaccine protocols.
Abstract:
The active immunisation by means of vaccination is the best strategy against the B hepatitis virus. Hevac B vaccine was administered to sixty one children (30 boys and 31 girls) aged 1 month 14 years co-inhabitants with chronic carries of virus. After administering three dosages, seroconversion, giving protecting titres (greater than or equal to mU/ml) was obtained in 57 children. Levels in three boys and one girl were not protective. Retarded immunity examination showed alterations of T-Lymphocyte subpopulations only in the girl. The four non responders received a supplementary vaccination a month later, beside the booster dose given one year later (T12). Only two boys had no seroconversion. In spite of the four vaccination four children had antibody titers below 100 mU/ml.
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