Massachusetts health officials confirmed three more human West Nile virus cases on Sept. 25, raising the state's 2026 total to 11. The new patients are a man in his 60s exposed in Suffolk County, a man of unknown age likely exposed in Suffolk County, and a man in his 90s exposed in Middlesex County, according to the Massachusetts Department of Public Health (DPH).
Risk remains high in Boston, Brookline, Cambridge, Chelsea, Everett, Malden, Newton, Revere, Somerville, Watertown, and Winthrop. Most of the rest of the state is at moderate risk. Officials said the risk will continue until the first hard frost.
