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An Optimized Hemagglutination Inhibition (HI) Assay to Quantify Influenza-specific Antibody Titers
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Immunogenicity of inactivated hepatitis A vaccine in children

S D Lee1, K J Lo, C Y Chan

  • 1Department of Medicine, Veterans General Hospital, Taipei, Taiwan, Republic of China.

Gastroenterology
|April 1, 1993
PubMed

Insights

The inactivated hepatitis A vaccine is safe and effective in children. It demonstrated high seroconversion rates and no significant side effects, making it a viable option for hepatitis A prevention.

Area of Science:

  • Pediatrics
  • Immunology
  • Vaccinology

Background:

  • Inactivated hepatitis A vaccine availability is increasing globally.
  • Hepatitis A remains a public health concern, necessitating effective prevention strategies.

Purpose of the Study:

  • To assess the immunogenicity and safety of an inactivated hepatitis A vaccine in children.
  • To establish optimal vaccination schedules for pediatric populations.

Main Methods:

  • A study involving 99 susceptible schoolchildren aged 4-15 years.
  • Administration of 360 ELISA units of inactivated hepatitis A vaccine at 0, 1, and 6 months.
  • Monitoring of antibody titers and adverse events post-vaccination.

Main Results:

  • High seroconversion rates: 97% after the first dose, 100% after the second and booster doses.
  • Geometric mean titers increased significantly after each dose, reaching 4133 mIU/mL after the booster.
  • No significant adverse events were reported, indicating a favorable safety profile.

Conclusions:

  • The inactivated hepatitis A vaccine is both safe and immunogenic in healthy children.
  • The vaccine establishes protective antibody levels, supporting its use in pediatric hepatitis A prevention programs.
Abstract

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