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2w ago

DuPage County Reports First Human West Nile Virus Case as Statewide Total Hits Three

Following positive mosquito detections, DuPage County raised its Personal Protection Index to level two to emphasize protective steps for residents.

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Overview

  • DuPage County Health Department confirmed a Glen Ellyn resident in their 50s as the county’s first human West Nile virus infection for 2025 after symptom onset in mid-July.
  • The Personal Protection Index in DuPage County was elevated from level one to level two due to rising numbers of WNV-positive mosquito pools and the new human case.
  • Illinois has now recorded three confirmed human West Nile infections this season, following a June hospitalization in Southern Illinois and a Lake County case in a resident in their 70s on July 16.
  • State and local health agencies warn that West Nile virus typically peaks between July and September and stress that no vaccine is available.
  • Residents are urged to reduce standing water, install tight-fitting window screens, apply EPA-approved insect repellent, and wear protective clothing to minimize infection risk.