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A new norovirus strain is spreading rapidly across the U.S., causing widespread illness with no vaccine or treatment available.
Norovirus is spreading earlier and faster across the U.S. in the 2024-2025 season, driven by a new strain, GII.17, which many lack immunity to.
Cases are rising in states including Massachusetts, Connecticut, Michigan, Indiana, and Texas, with outbreaks in schools, homes, and healthcare facilities.
Symptoms—vomiting, diarrhea, cramps—appear 12 to 48 hours after exposure and last one to three days, posing serious dehydration risks for young children, older adults, and immunocompromised people.
The virus spreads via contact, contaminated food or surfaces, and airborne particles, surviving for days and remaining contagious after symptoms end.
Prevention relies on handwashing with soap and water, bleach-based disinfection, avoiding contact with sick individuals, and staying home until at least two to three days after symptoms resolve.
No vaccine or specific treatment exists, so hydration and hygiene are critical.
The CDC estimates norovirus causes millions of illnesses, tens of thousands of hospitalizations, and hundreds of deaths annually, with cases expected to peak through winter.
Una nueva cepa de norovirus se está extendiendo rápidamente por los Estados Unidos, causando una enfermedad generalizada sin vacuna ni tratamiento disponible.