"Due to the hot and dry weather in the spring and early summer, the amplification of the virus started early. We have not been seeing an unusually high number of mosquitoes, but we have been seeing a high rate of positive mosquito pools. Last week’s cool and wet weather dropped our Culex [West Nile Virus carrying mosquito] count of mosquitoes by nearly 83%, but we still had nearly the same rate of positive pools. Much of the U.S. is experiencing the same, if not worse conditions."
The Illinois Department of Public Health has also reported that Illinois has suffered its first West Nile Virus related death when a DuPage County man in his 70s diagnosed with the virus died August of 2012.