MDPH concluded the mosquito testing season with 164 WNV positive mosquito samples from Barnstable, Berkshire,
Bristol, Essex, Hampden, Hampshire, Middlesex, Norfolk, Plymouth, Suffolk, and Worcester Counties. MDPH also
reports 28 EEE positive mosquito samples from Barnstable, Bristol, Hampden and Worcester Counties.
Average daytime temperatures will continue to support populations of mosquito vectors which pose a risk for human
transmission until a statewide hard frost. Avoid mosquito bites by using EPA approved repellents, appropriate
clothing and avoiding peak mosquito activity between dusk and dawn. Remove standing water by emptying
containers and tarps.
Check your risk levels throughout the season by visiting our interactive site https://www.mass.gov/info-
details/Massachusetts-arbovirus-update and review the 2023 MDPH Surveillance and Response Plan for updates to
risk levels and risk messaging. https://www.mass.gov/doc/2023-arbovirus-surveillance-and-response-plan/download