An Illinois bird tested positive for West Nile virus, but no humans have been diagnosed with the virus this year.
Ryan Kerch is the environmental health supervisor with the Winnebago County Health Department. He says they don't want to scare anybody, but it's important to understand that the virus is always out there.
"West Nile is present," he said. "It is active and it has been throughout the state for a number of years. It is a statewide concern."