The Massachusetts Department of Public Health (DPH) has released its Arbovirus Weekly Report for the week of July 7, 2025, detailing the current status of West Nile virus (WNV) and eastern equine encephalitis (EEE) in the state. The report indicates that DPH has conducted statewide mosquito testing since June 16, 2025, identifying four WNV positive mosquito samples across Barnstable, Middlesex, Suffolk, and Worcester Counties. Notably, there have been no reported cases of EEE in humans, animals, or mosquitoes so far this season. The report emphasizes the importance of public health measures, including the use of EPA-registered mosquito repellents, wearing protective clothing, and eliminating standing water to reduce mosquito breeding.

In addition to the surveillance data, the report provides key talking points for public awareness, highlighting the historical context of EEE and WNV activity in Massachusetts. The DPH has noted that most human cases of these viruses typically occur in August and September, and they are actively monitoring arboviral activity through trapping and testing. The report also includes recommendations for individuals to protect themselves from mosquito bites, such as applying insect repellent, being aware of peak mosquito hours, and ensuring homes are mosquito-proof by draining standing water and repairing screens.