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

Last year saw 69 cases across the state, including six in Lake County, according to data from the Illinois Department of Public Health.