The Massachusetts Department of Public Health (DPH) recently reported eight human cases of West Nile virus this season, including two new cases. One case involved a woman in her 60s from Middlesex County, while the other was a man in his 50s from Suffolk County. This surge in cases has raised concerns about higher virus levels in areas like Arlington, Chelsea, Medford, and Waltham.
Over the last decade, most people who get sick from West Nile virus do so in August or September, with only 12% becoming ill after October 1. Public Health Commissioner Robbie Goldstein noted that while we are nearing the end of the peak season for West Nile, the risk remains until the first hard frost. He urges everyone to take precautions like using mosquito repellent and wearing long sleeves to minimize skin exposure.
The DPH first detected West Nile-positive mosquitoes in Massachusetts on June 17. Now, the virus poses a high risk in 47 towns, including Suffolk and Middlesex counties, and a moderate risk in 210 others across the state. They tested 445 mosquito samples this season, many of which tested positive for the virus.
Interestingly, a goat in Lunenburg also tested positive for West Nile virus in July. Additionally, 23 Eastern equine encephalitis (EEE) positive mosquito samples were found this year, but thankfully, no human cases of EEE have been reported as of September 26.
To avoid mosquito bites, the DPH recommends using insect repellent with EPA-approved ingredients such as DEET, permethrin, or picaridin. For little ones, it’s best to avoid DEET on babies under two months and to use lower concentrations for older kids. Also, scheduling outdoor activities away from dusk and dawn when mosquitoes are most active is smart.
Keeping areas free of standing water and installing window screens can prevent mosquitoes from entering homes. The DPH also offers an online resource for real-time West Nile virus updates in your community.
In light of recent data, experts emphasize that staying informed about mosquito activity is vital. According to the CDC, approximately 70% of West Nile cases are asymptomatic, but the potential for severe illness exists. Knowing how to protect yourself can significantly reduce the risk.
To learn more about the virus and stay updated, visit the Massachusetts arbovirus update page.
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