Reappraisal of the immunogenicity and safety of three hepatitis A vaccines in adolescents

Seo Hee Yoon, Han Wool Kim, Jong Gyun Ahn, In Tae Kim, Jong Hyun Kim, Kyoung Ae Kong, Kyung Hyo Kim

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Although the overall incidence of hepatitis A in Korea has been decreasing, adolescents remain highly vulnerable to its outbreaks. This study was conducted to compare the immunogenicity and safety of three hepatitis A vaccines in Korean adolescents. Healthy anti-hepatitis A virus seronegative subjects aged 13 to 19 yr were randomized in three equal groups to receive two doses of Avaxim™, Epaxal®, or Havrix®, 6 to 12 months apart. Seroconversion rates one month after the first dose were 98%, 95%, and 93% for Avaxim™, Epaxal®, and Havrix®, respectively. Seroconversion rates reached 100% for all vaccine groups one month after the second dose. Anti-HAV geometric mean concentrations (GMCs) were 7,207.7 mIU/mL (95% CI, 6023.1-8684.7), 1,750.5 mIU/mL (95% CI, 1362.9-2248.3), and 1,953.5 mIU/mL (95% CI, 1459.4-2614.7) after two doses of Avaxim™, Epaxal®, and Havrix® respectively. Avaxim™ was significantly more immunogenic than Epaxal® and Havrix®, whereas there were no significant differences in antibody responses between Epaxal® and Havrix®. Local and systemic solicited adverse events (AEs) were mostly of mild-to-moderate intensity and resolved within 5 days. No serious AEs were reported. In conclusion, all three vaccines are highly immunogenic and well-tolerated in Korean adolescents. (Clinical Trial Registry NCT00483470).

Original languageEnglish
Pages (from-to)73-79
Number of pages7
JournalJournal of Korean Medical Science
Issue number1
StatePublished - 2016

Bibliographical note

Publisher Copyright:
© 2016 The Korean Academy of Medical Sciences.


  • Adolescent
  • Antibody formation
  • Hepatitis A vaccines
  • Safety


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