Interchangeability of Hepatitis A boosters, Avaxim and Vaqta, in healthy adults following a primary dose of the combined typhoid/Hepatitis A vaccine Viatim

Vaccine. 2006 May 15;24(20):4450-7. doi: 10.1016/j.vaccine.2005.08.112. Epub 2006 Mar 22.

Abstract

This study investigated the suitability of Avaxim and Vaqta as Hepatitis A booster vaccines 6 months after priming with the combined Hepatitis A/typhoid vaccine, Viatim. One hundred and twenty adults were randomly assigned to one of the three groups. Group A (reference group) received Avaxim then Avaxim (n = 40), Group B received Viatim then Avaxim (n = 41) and Group C received Viatim then Vaqta (n = 39). One month after booster vaccination, anti-Hepatitis A virus (anti-HAV) antibodies geometric mean concentrations (GMC) of subjects primed with Viatim were non-inferior to the group primed and boosted with the monovalent Hepatitis A vaccine Avaxim. Anti-Salmonella typhi capsular polysaccharide virulence antigen (anti-Vi) GMCs in groups primed with Viatim were protective and all vaccines were well-tolerated. Therefore, Viatim may be used as a primary HAV vaccine with either Avaxim or Vaqta as Hepatitis A boosters and it will provide the same protection as two doses of Avaxim.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Adult
  • Female
  • Hepatitis A Vaccines / administration & dosage*
  • Hepatitis A Vaccines / immunology
  • Humans
  • Immunization, Secondary*
  • Male
  • Middle Aged
  • Typhoid-Paratyphoid Vaccines / administration & dosage*
  • Typhoid-Paratyphoid Vaccines / immunology
  • Vaccines, Combined

Substances

  • Hepatitis A Vaccines
  • Typhoid-Paratyphoid Vaccines
  • Vaccines, Combined