The changing epidemiology of varicella incidence after implementation of the one-dose varicella vaccination policy

Ie Bin Lian, Yu Zen Chien, Pi Shan Hsu, Day Yu Chao

Research output: Contribution to journalArticle

15 Citations (Scopus)


The varicella vaccine has been available in the Taiwan market since July 1997. Beginning 1998-1999, Taipei City and Taichung City/County as the early launch areas included the varicella vaccine in their free pediatric vaccination programs. By contrast, the national free vaccination program was not implemented until 2004. We aim to investigate the changing epidemiology of varicella incidence through an analysis of age-period-cohort effects. With the greatest decrease in varicella incidence occurring in children aged below 6, the incidence of varicella shifted to older age groups as reflected in different birth cohorts. The current study provides important implications for the current vaccination policy.

Original languageEnglish
Pages (from-to)1448-1454
Number of pages7
Issue number7
Publication statusPublished - 2011 Feb 4


All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Immunology and Microbiology(all)
  • veterinary(all)
  • Public Health, Environmental and Occupational Health
  • Infectious Diseases

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