Massachusetts communities face rising EEE risk from mosquitoes

In Concord, Massachusetts, a playground and field were sprayed for mosquitoes after the eastern equine encephalitis (EEE) virus was detected in local samples. This action is part of a broader response as numerous communities in the state are identified at varying risk levels for EEE, with some areas classified as critical, high, or moderate risk. The Department of Public Health has reported four confirmed human cases of EEE this summer, with two cases in Middlesex County, one in southern Worcester County, and another in Plymouth County. Tragically, a 41-year-old man from New Hampshire died from the virus last month, highlighting the severity of the situation. As of 2024, 95 mosquito samples across Massachusetts have tested positive for EEE, indicating a significant presence of the virus in the environment. The risk levels for towns are categorized into critical, high, and moderate, with critical areas experiencing excessive risk due to confirmed human cases. Communities such as Douglas, Oxford, Sutton, and Webster are under critical risk, while others like Acton, Ayer, and Boxboro face high risk. EEE is a rare but serious virus that typically spreads in swampy areas, with horses believed to be potential hosts. While many infected individuals may not show symptoms, those who do can experience severe health issues, including fever and brain swelling. The CDC reports a high mortality rate of about 30% among those infected, with many survivors suffering from long-term neurological problems. To mitigate the risk of EEE, health experts recommend preventive measures such as using insect repellent, wearing protective clothing, and avoiding outdoor activities during peak mosquito activity times. Communities are urged to remain vigilant as the threat of EEE continues to loom over Massachusetts.