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Related Experiment Videos

Early immunisation with hepatitis B vaccine: a five-year study.

C Belloni1, A Pistorio, C Tinelli

  • 1Division of Neonatal Intensive Care, IRCCS San Matteo, Viale della Libertà, 49-27100, Pavia, Italy. pistorioa@smatteo.pv.it

Vaccine
|January 5, 2000
PubMed
Summary

The recombinant Hepatitis B vaccine (HBV) administered on an accelerated schedule induced better long-term immunologic memory in children. Early administration of the HBV vaccine is key for sustained antibody concentrations.

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Area of Science:

  • Immunology
  • Vaccinology
  • Pediatrics

Background:

  • Hepatitis B virus (HBV) infection is a significant global health concern.
  • Effective vaccination strategies are crucial for preventing HBV transmission and long-term liver disease.
  • Understanding the immunologic memory induced by different vaccine schedules is vital for optimizing public health interventions.

Purpose of the Study:

  • To compare the immunologic memory induced by an accelerated versus a traditional recombinant Hepatitis B vaccine schedule in children.
  • To assess long-term antibody concentrations and response to booster doses.
  • To determine the optimal timing for recombinant HBV vaccination for sustained immunity.

Main Methods:

  • A study involving 200 children born to HBs-Ag negative mothers.

Related Experiment Videos

  • Evaluation of serum antibody concentrations (anti-HBsAg) at seroconversion and after five years.
  • Administration of an additional booster dose to children with low antibody levels.

    • Main Results:

    • At seroconversion, the traditional schedule showed a higher percentage of children with anti-HBsAg concentrations >100 mIU/ml compared to the accelerated schedule.
    • After five years, this difference was not statistically significant.
    • A booster dose effectively raised antibody concentrations above 100 mIU/ml in all children who had levels below 10 mUI/ml.

    Conclusions:

    • Recombinant HBV vaccine administered earlier (accelerated schedule) leads to better long-term immunologic memory.
    • Early HBV vaccination is associated with more robust and sustained antibody responses.
    • Booster doses are effective in restoring protective antibody levels, ensuring long-term immunity.