Overview

• The new infections involve a woman in her 60s exposed in Middlesex County and a man in his 50s exposed in Suffolk County, according to the Department of Public Health.
• Arlington, Chelsea, Medford and Waltham were newly elevated to high risk, with 210 other municipalities at moderate risk statewide.
• Since the first positive mosquitoes were detected on June 17, 445 mosquito samples have tested positive for West Nile across multiple counties.
• DPH reports one animal infection this season in a goat and continues to track Eastern equine encephalitis, with 23 EEE‑positive mosquito samples and no human or animal cases.
• Residents are urged to use EPA‑registered repellents, cover exposed skin during dusk‑to‑dawn hours, remove standing water, and monitor the Massachusetts Arbovirus Update for local conditions.