A mosquito sample from Union County tested positive for West Nile virus.
The Southern Seven Health Department reports the sample was collected July 17th.
This comes on the heels of a July 12th mosquito sample that tested positive for West Nile near Murphysboro.
Four out of five people who are bitten by an infected mosquito will not experience any illness. Those who do get sick commonly experience fever, nausea, headache and body aches within 3 to 14 days of the bite. But, serious illness such as encephalitis and meningitis, with lingering complications and even death, are possible.
Last month, a Will County man became Illinois' first human case of West Nile virus this year.