First Mosquitoes Test Positive for West Nile Virus in Illinois in 2022

Illinois health officials are confirming the first mosquitoes to test positive for West Nile virus in the state this year. The DuPage County Health Department collected a positive mosquito batch Tuesday from Roselle in DuPage. No human cases of West Nile virus have been reported so far this year. West Nile is transmitted through the bite of a house mosquito that has picked up the virus by feeding on an infected bird.