/ Source: WEEK-TV
The Illinois Department of Public Health has confirmed the first human case of West Nile virus in Illinois for 2009.
The St. Clair County Health Department reported a person in their 50s developed the virus.
The state director of health says the cool summer has slowed mosquito activity this year.
West Nile virus is transmitted through the bite of a mosquito that has picked up the virus by feeding on an infected bird.
