A Third human case of West Nile virus in Illinois has been reported, this time in DuPage County. The DuPage County Health Department confirmed the case on Thursday. The department said the individual is a Glen Ellyn resident in their 50s, and the onset of symptoms was mid-July.

Health officials in DuPage County have confirmed the county’s first human case of West Nile Virus this year, the third confirmed case statewide in 2025. Health officials from the DuPage County Health Department (DCHD) confirmed Thursday that the county’s first human case of West Nile Virus (WNV) had been detected in

Mosquitoes with West Nile Virus have been found in LaSalle County for the first time this year, health officials said.