Norovirus Spreads Across United_States

A highly contagious norovirus, often called the 'winter vomiting disease,' is spreading across much of the United States>>>, with recent spikes observed in the Northeast and among hikers in Southern California. Wastewater surveillance by Stanford University and Emory University School of Medicine's WastewaterSCAN program indicates 'high' national levels, though the United States — Centers for Disease Control and Prevention>>> reports outbreak numbers consistent with past averages. A mutated strain, GII.17, has become predominant, accounting for 75% of outbreaks in the 2024-25 season, partially evading prior immunity. The virus spreads easily through contaminated food, water, or surfaces, and symptoms include vomiting, diarrhea, and stomach cramps. While most healthy adults recover at home, vulnerable populations may require medical attention for dehydration. Entities like the Pacific Crest Trail Association>>> and United States — San Bernardino County, California>>> are monitoring localized outbreaks.