[PDF] Baxter, Roger, et al. "Long-term effectiveness of varicella vaccine: a

Results: In this cohort of vaccinated children, the average incidence of varicella was 15.9 per 1000 person-years, nine- to tenfold lower than in the prevaccine era. Vaccine effectiveness at the end of the study period was 90%, with no indication of waning over time.
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  • How effective is the varicella vaccine over time?

    From the second to eighth year after vaccination, the vaccine effectiveness remained stable at 81 to 86%.
    Most vaccinated children who developed varicella during the 8 years after vaccination had mild disease.

  • Is the varicella vaccine lifelong immunity?

    Most people who are vaccinated with 2 doses of varicella vaccine will be protected for life.
    Children need 2 doses of varicella vaccine, usually: First dose: age 12 through 15 months.
    Second dose: age 4 through 6 years.

  • Does chicken pox vaccine have long term effects?

    Millions of doses of the vaccine have been given, and there is no evidence of any increased risk of developing a long-term health condition as a result of the vaccination.

  • Does chicken pox vaccine have long term effects?

    The vaccine was 85 percent effective (95 percent confidence interval, 78 to 90 percent; P<0.001).

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Outbreak of varicella in a highly vaccinated preschool population

High single-dose varicella vaccination coverage is effective in reducing 1995 through 2009 in the United States26 Roger Baxter et al. ... al. Long-term.



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