Dr. Linn Haramis

A culex tarsalis female mosquito that was caught in a trap will be tested for the presence of the West Nile virus. (Photo by Jeff Topping/Getty Images)

Warm Weather Prompts Early West Nile Testing

Testing for West Nile Virus is starting two weeks earlier than normal this year, following the unseasonably warm winter and spring.

CBS Chicago–04/13/2012