Environmental Public Health Tracking: West Nile Virus Data

West Nile virus is spread by the bite of an infected Culex mosquito, which is a type of mosquito commonly found in Wisconsin. Public health professionals track West Nile virus in order to educate their communities and plan prevention efforts. These data can help us reduce the number of people infected each year.

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Explore definitions and explanations of terminology found on this webpage, like age-adjusted rate and confidence intervals.

Frequently asked questions

West Nile virus data details

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Last revised January 17, 2025