By Elly Yu for LAist
Originally published on Dec. 17, 2025
Norovirus is up in LA County so now’s a good time to remember to wash your hands
The L.A. County Department of Public Health says norovirus cases – or the stomach flu – are on the rise.
The L.A. County Department of Public Health says cases of norovirus — or the stomach flu — are on the rise.
Officials say over a three-week period ending Dec. 11, wastewater detection of norovirus increased by more than 250% countywide and 154% within the city of L.A.
The virus is very contagious, and is spread through direct contact with someone who has it, by eating contaminated food or by touching a contaminated surface, then touching your mouth.
Symptoms include diarrhea, nausea and vomiting and usually show up 12-48 hours after exposure. Children under 5 and older adults are more likely to experience more severe effects from the virus.
How to protect yourself
Public health officials say people should:
- Wash their hands frequently, especially before eating or preparing food or going to the bathroom
- Wash fruits and vegetables and thoroughly cook shellfish
- Clean infected surfaces with a bleach-based cleaner (alcohol won’t kill norovirus)
