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Year's First Human Case of West Nile Virus Confirmed in Mass.
The Massachusetts Department of Public Health confirms 319 positive mosquito samples statewide, raising human infection risk and urging residents to take preventive measures.
- A woman in her 70s from Middlesex County was confirmed as Massachusetts’ first human West Nile Virus case in 2025, announced Tuesday by the Department of Public Health.
- This case follows over 300 WNV-positive mosquito samples detected since June 17 across 12 counties and a risk level increase from low to moderate in some communities last week.
- West Nile virus is mainly spread by infected mosquitoes found throughout the state, with elevated risk levels identified in a group of communities within Suffolk and Middlesex counties, while nearly 200 other municipalities face a moderate threat.
- Public Health Commissioner Robbie Goldstein warned that West Nile virus poses a significant health threat, noting that infection rates in local mosquitoes are currently elevated in Massachusetts. Additionally, State Epidemiologist Catherine Brown explained that mosquitoes are expected to remain active until the first hard frost occurs.
- Health officials urged residents to use EPA-registered repellents, wear protective clothing, remove standing water, install window screens, and avoid outdoor activities at peak mosquito times to reduce infection risk.
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21 Articles
State health officials announce first human case of West Nile Virus in Massachusetts this year - Boston News, Weather, Sports
State health officials announced the first human case of West Nile Virus this year in Massachusetts. “West Nile virus can be a very serious disease and its presence in mosquitoes remains high right now in Massachusetts,” said Public Health Commissioner Robbie Goldstein, MD, PhD. “While September brings cooler air and the return to school for many in the state, the risk from WNV is going to be elevated for some time. Residents should continue to …
First human case of West Nile virus reported in Massachusetts this season
The woman was exposed in Middlesex County, the Department of Public Health said. The risk of WNV is high in 10 municipalities in Suffolk and Middlesex counties, and the risk level is moderate in 193 municipalities throughout the state.
State’s first human case of West Nile virus in 2025 reported in woman in Middlesex County, officials say - The Boston Globe
The announcement comes as the risk of exposure to West Nile Virus remains elevated across several Massachusetts communities, officials said.
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