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The number of chickenpox cases can vary significantly from year to year, but before the widespread use of the varicella vaccine, there were approximately 4 million cases annually in the United States. Since the introduction of the vaccine in 1995, reported cases have decreased by over 90%, with recent estimates suggesting around 3,000 to 10,000 cases per year in the U.S. However, this can differ based on factors such as vaccination rates and outbreaks. Globally, the incidence remains higher in areas with lower vaccination coverage.

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1mo ago

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Is chickenpox prevalent and If not when was it prevalent?

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