Submit a report or find your county coordinator
Current Counties Positive for West Nile Virus and Jamestown Canyon Virus
These static maps show 2025 positive West Nile Virus counties in red and 2025 positive Jamestown Canyon Virus counties in yellow.
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2025 West Nile Virus Activity by County
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2025 Jamestown Canyon Virus Activity by County
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Eastern Equine Encephalitis Virus Fact Sheet
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Jamestown Canyon Virus Fact Sheet
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La Crosse Virus Fact Sheet
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WNV Fact Sheet
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A Guide to Homeowner Mosquito Control (English)
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A Guide to Homeowner Mosquito Control (Spanish)
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See Previous Years Surveillance Results
Mosquito Testing Data(opens in a new tab) For additional information regarding these data, please contact brocoder@pa.gov