Mark Richardson
Illinois News Connection
The Illinois Department of Public Health said the first positive test for West Nile virus in 2025 has been detected in Winnebago County near Rockford.
Health officials warned people in the infected area and elsewhere to take precautions to avoid the mosquito-borne disease, which is expected to spread across the state. Last year, Illinois reported 69 cases of West Nile, with 13 reported human deaths.
Sameer Vohra, director of the Illinois Department of Public Health, said evidence of the disease usually emerges this time of year.
“In Illinois, we typically see the first environmental positive test for West Nile in mid- to late May,” Vohra explained. “Mosquitoes typically emerge in the spring and are active until the first hard frost of the year.”
Vohra noted West Nile virus is an endemic disease in Illinois, meaning it is commonly found in the state. Public health officials are highlighting the importance of taking action to “Fight the Bite” during National Mosquito Control Awareness Week, which runs from June 18-24.
Vohra pointed out most people who are bitten by infected mosquitoes do not contract the disease but one in five will show symptoms ranging from mild discomfort to a serious and possibly fatal illness.
“Right now, there’s no treatment for West Nile virus,” Vohra emphasized. “But supportive care is really important, especially if you’re developing symptoms or you’re that one of 150 people that can develop severe illness.”
Public health officials have advised Illinoisans to wear long sleeves and pants outdoors, use Environmental Protection Agency-approved insect repellent and stay indoors during peak mosquito hours at dawn and dusk. They also recommend trying to keep mosquitoes from breeding.
“One way to do that is to dump any standing water,” Vohra advised. “Examples of that include flowerpots, children’s toys, pet bowls, bird baths, buckets, used tires, abandoned swimming pools, any place where you can get standing water.”
