Mammoth Lakes Faces Ongoing Hantavirus Threat After Winter Tragedies

In Mammoth Lakes, a ski town in California’s Eastern Sierra, three people lost their lives last year to hantavirus pulmonary syndrome—a rare illness caused by a rodent virus. The deaths shocked residents because the infections happened in winter, a season when the disease usually stays low. The virus spreads through droppings or saliva of deer mice, common in the area. Officials say that last year’s higher numbers of these rodents led to more contaminated dust and increased exposure risk. Since 1993, the county has recorded only 27 hantavirus cases, making this spike unusual. The Mono County health department responded quickly. They urged people to seal gaps in homes, keep food sealed, and wear masks and gloves when cleaning droppings. They also warned against vacuuming, which can stir up infectious particles. Mammoth Mountain Ski Area, where one of the victims worked, had already had a hantavirus policy in place. After the deaths, they hired an independent firm to deep‑clean certain areas and trained staff on symptoms, risk activities, and prevention.County officials expanded outreach beyond the usual channels. They partnered with neighboring Inyo County, the state health department, local hospitals, and national experts to share information. They also reached out to the Indian Health Service in Arizona and a university in New Mexico for guidance, since those states have more experience with the virus. Recognizing that many residents speak Spanish, the county launched bilingual radio and print campaigns. They also distributed N95 masks to businesses in a door‑to‑door effort, aiming to cover every possible angle. The community remains vigilant. As of March’s end, no new hantavirus cases were reported in the county. Officials emphasize that staying informed and practicing simple precautions can keep people safe while they enjoy their favorite winter activities.