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Williamson County mosquitoes test positive for West Nile virus as health officials urge precautions

Health officials in Williamson County report that the first mosquitoes of the season have tested positive for West Nile virus. Residents are urged to take precautions to prevent bites. These findings are part of broader regional detections including Macoupin County and the Twin Cities metro area.

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What changed

Mosquito traps in Williamson County have tested positive for West Nile virus for the first time in 2026.

Live updates

  1. West Nile Virus Detected in Williamson County Mosquitoes

    Health officials in Williamson County report that the first mosquitoes of the season have tested positive for West Nile virus. Residents are urged to take precautions to prevent bites. These findings are part of broader regional detections including Macoupin County and the Twin Cities metro area.

    What's confirmed:

    • Williamson County mosquitoes tested positive for West Nile virus.
    • The Williamson County Health District recommends draining standing water, using EPA-approved repellent, and wearing long sleeves and pants.
    • WCCHD does not treat private property for mosquitoes.

    Still unconfirmed:

    • Cook County officials are urging protection against West Nile virus during National Mosquito Control Awareness Week.
    confidence 90%