West Nile virus is not contagious between people because humans are dead-end hosts, which means they don't pass on the virus. There is a median of about 2,200 cases of the virus in the U.S. every year, according to the Department of Health and Human Services.

There are now two confirmed and two probable cases of the mosquito borne illness and one EEE case in the state

Positive samples of West Nile virus in mosquitoes have been reported from north to south in Berkshire County, placing all but three towns at "moderate risk." The rates vary from