The Massachusetts Department of Public Health (DPH) has released its weekly report for the week of July 7, 2025, detailing the current surveillance and response activities regarding arboviruses, specifically West Nile virus (WNV) and eastern equine encephalitis (EEE). The report indicates that DPH began statewide mosquito testing on June 16, 2025, and has identified four WNV positive mosquito samples across Barnstable, Middlesex, Suffolk, and Worcester Counties. In 2024, the DPH reported four EEE human cases and significant mosquito activity, prompting aerial and ground spraying in affected areas. The report emphasizes the importance of public health measures, including the use of EPA-registered mosquito repellents, wearing protective clothing, and reducing standing water to mitigate mosquito populations.

Key updates in the report include the insertion of new legal language regarding the total number of positive cases for both WNV and EEE, as well as recommendations for public awareness and prevention strategies. The report also highlights the peak mosquito activity hours and the importance of mosquito-proofing homes by draining standing water and installing or repairing screens. Overall, the DPH continues to monitor arboviral activity closely and encourages residents to take proactive measures to protect themselves from mosquito-borne illnesses.