Mosquito, West Nile,

FILE - A municipal biologist examines a mosquito in Salt Lake City on Aug. 26, 2019.  (AP Photo/Rick Bowmer, File)

COOK COUNTY, Ill. (WAND) - The first West Nile death in Illinois for 2025 has been reported in Cook County. 

Cook County Department of Public Health confirmed the first human West Nile virus-related death, a suburban Cook County resident in their 60s. Laboratory testing confirmed West Nile virus was a contributing factor to the resident’s death. 
 
West Nile virus occurs in humans when they are bitten by mosquitoes that contracted the virus by feeding on infected birds.   
 
The first human case in the state for 2025 was reported in June. 
 
Since May 11, through Sept. 6, suburban Cook County has recorded 33 cases of West Nile Virus, about twice the number of cases from last year. 
 
Most cases of West Nile virus infection have either mild or no symptoms and may go unreported.
 
"The year's first death from West Nile virus in Illinois is a sobering reminder that mosquito-borne illnesses are still with us," said IDPH Director Dr. Sameer Vohra. “It’s important to take appropriate precautions as the weather remains warm. We urge everyone to 'Fight the Bite' by practicing the Three R's: Reduce opportunities for exposure to mosquitoes. Repel insect bites by wearing protective clothing and using insect repellent. Report stagnant water that can serve as a breeding ground for mosquitoes to your local health department."
 
“As long as mosquitoes are flying around, people are at risk of mosquito bites and of contracting West Nile virus,” said Cook County Department of Public Health Chief Operating Officer Dr. Kiran Joshi. “Everyone should take steps to protect themselves from West Nile virus, especially seniors, who are at higher risk for severe illness and death.”