Long-term Effectiveness of Varicella Vaccine: A 14-Year, Prospective Cohort Study

  title={Long-term Effectiveness of Varicella Vaccine: A 14-Year, Prospective Cohort Study},
  author={Roger Baxter and Paula Ray and Trung Nam Tran and Steven B. Black and Henry R. Shinefield and Paul M Coplan and Edwin M. Lewis and Bruce H. Fireman and Patricia Saddier},
  pages={e1389 - e1396}
BACKGROUND: Varicella vaccine was licensed in the United States in 1995 for individuals ≥12 months of age. A second dose was recommended in the United States in June 2006. Varicella incidence and vaccine effectiveness were assessed in a 14-year prospective study conducted at Kaiser Permanente Northern California. METHODS: A total of 7585 children vaccinated with varicella vaccine in their second year of life in 1995 were followed up prospectively for breakthrough varicella and herpes zoster (HZ… 

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