A human has tested positive for West Nile virus (WNV) in Chester County. According to the state officials it is the first case of WNV in the local area in some time.

A human has tested positive for West Nile virus (WNV) in Chester County. According to the state officials it is the first case of WNV in the local area in some time.

Mosquitoes carrying the West Nile virus (WNV) have been found in 6 Pennsylvania counties: Berks, Bucks, Chester, Delaware, Lancaster, and Philadelphia.

Human cases of West Nile virus (WNV) confirmed in Chester County.