Norovirus is spreading earlier again this year, wastewater data shows
Last year's outbreaks were the largest in a decade, fueled by an emerging variant of the highly contagious, hard-to-kill virus. What will this year look like?
www.nbcnews.comHere are the latest highlights on norovirus as of now:
- Norovirus activity is trending upward in parts of the U.S., with wastewater surveillance indicating higher levels in several regions and on cruise ships, driven in part by emerging variants. This mirrors recent patterns where early signals from wastewater data precede clinical case surges.[1][2]
- Outbreaks remain a concern, though the current season’s total outbreaks may be lower than the height of last year’s peak, the pace and geographic spread suggest heightened transmission risk during the winter months.[2][1]
- Public health agencies continue to monitor norovirus activity and share guidance on prevention and early treatment. Expect ongoing updates as the season progresses, with emphasis on hand hygiene, surface disinfection, staying hydrated, and seeking care if dehydration is a concern.[5][6]
What this means for you in Los Angeles:
- Increased vigilance this season is prudent. Practice thorough handwashing (soap and water, especially after using the bathroom and before eating), disinfect commonly touched surfaces with effective cleaners, and wash fruits and vegetables properly.
- If you or someone in your household develops vomiting and diarrhea, start oral rehydration early and seek medical advice if symptoms are severe, persistent, or if anyone in a high-risk group (very young, elderly, or with chronic illness) shows signs of dehydration.
- Be aware of local developments or school/workplace notices about outbreaks, and follow CDC and local health department guidance as the season unfolds.
Would you like a concise summary of symptoms, prevention steps, and when to seek care, tailored to your household or a quick 1-page handout you can print? I can also pull a short, up-to-date timeline of notable outbreaks in your area if you’d like.
Citations:
- Norovirus surge and wastewater signals, with regional and variant context.[1]
- Outbreak activity and wastewater data context.[2]
- General guidance and outbreak monitoring resources.[6][5]