Positive Samples of West Nile Virus in Mosquitos in Norwood and Walpole

As of August 29th, Massachusetts has updated its data for arbovirus risk levels in municipalities throughout the Commonwealth, with the result that the risk for the local Westwood area is currently assessed as “moderate” for West Nile Virus, and in the range of “remote” to “low” for Eastern Equine Encephalitis.

Westwood Minute has excerpted local data from the state’s risk assessment for WNV and EEE, and has compiled it into the following table:

2025 EEE and WNV Risk Level for Local Area of Westwood, MA in Norfolk County

Source:  Mass.gov, Department of Public Health and Bureau of Infectious Disease and Laboratory Sciences, 2025 EEE and WNV risk level and data

On August 19th positive samples for WNV were found in mosquitoes in Norwood and also in Walpole.

On July 28th, two positive samples for WNV were found in Canton.

To reduce exposure to mosquito bites, public health officials recommend:

• Avoid being outdoors between dusk to dawn;
• Wear long pants, long-sleeved shirts, and socks when outdoors;
• Use an insect repellent with DEET, permethrin, picaridin, IR3535 or oil of lemon eucalyptus, taking care to use reduced potency (as directed by label) on children;
• Repair holes in window screens to keep mosquitos from entering homes;
• Remove standing water from around the home.

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