Rhode Island has confirmed its first human case of West Nile virus for 2026, involving a Washington County resident in their 60s who began feeling sick in early September. The patient has been recovering in the hospital and is expected to be released soon, according to state officials.
The Centers for Disease Control and Prevention confirmed the positive test last week, as reported by What'sUpNewp. Health officials believe the infection was likely acquired outside Rhode Island, pointing to the patient's travel history to an area with active West Nile transmission, according to WJAR.
Risk Level Drops as Mosquito Season Winds Down
Rhode Island has lowered its West Nile risk level to low as mosquito populations decline with the changing season, the same report notes. But the state isn't entirely in the clear yet. Officials told WPRI that a slight risk will linger until the first hard frost — defined as three consecutive hours below 32 degrees across the entire state.
Mosquito trapping and testing for the 2026 season have wrapped up, per the same account. Officials also reported no human or mosquito findings of Eastern equine encephalitis in Rhode Island this year.
Most Infections Go Unnoticed
West Nile virus remains the leading cause of mosquito-borne disease in the continental United States, and there's currently no vaccine to prevent it or medication to treat it, the outlet reports. Most people who get infected never feel sick at all. About one in five develop a fever and other symptoms, while roughly one in 150 go on to develop a serious, sometimes fatal illness.
Rhode Island's health and environmental agencies track West Nile virus, Eastern equine encephalitis and other arboviruses year-round, with surveillance aimed at catching outbreaks early and preventing human transmission, according to the Rhode Island Department of Health.
Neighboring States Report Cases Too
Rhode Island isn't alone in seeing West Nile activity this year. Massachusetts health officials announced their 12th human case of the virus in the state, according to Mass.gov. New Hampshire also confirmed its first human case of the year, as reported by WMUR.
