A highly contagious norovirus outbreak is spreading across the United States, with early cases reported among hikers on the Pacific Crest Trail in Southern California. - The outbreak has affected hikers in the La Cresta area of Riverside County.
- Symptoms include sudden vomiting, diarrhea, and stomach cramps lasting 1-3 days. - Prevention includes frequent handwashing, disinfecting surfaces, and staying home when sick.
- The CDC advises hydration and medical attention for dehydration. Health officials urge the public to take precautions as the virus spreads rapidly through contaminated surfaces and direct contact.