Where to find data

Summer 2016

See statewide data on West Nile virus by county here.  In 2014-15-16, Chester County had a total of 3 known human cases and no known WNV-related deaths.

In 2016, 4 Chesco releases concerned mosquitoes and WNV, including 2 about spraying. See here.

Summer 2017

Statewide WNV data by county here. So far: one known human case in Chesco as of 8/10/17, no deaths.

One Chesco spraying event so far (see here).


Ongoing information

Chesco health Department News Releases (including about mosquito spraying) here.

See spraying (“adulticide events”) in Chester County here, beginning 8/10/17.

WNV “hot zones” in PA, for the preceding 3 weeks here.