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Norovirus: A Silent but Deadly Threat in LA County

Los Angeles, USAWednesday, December 17, 2025
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A Sneaky Virus Makes a Comeback

In Los Angeles County, health officials have detected a significant resurgence of the norovirus. Wastewater surveillance, a crucial tool in virus detection, has revealed alarming statistics:

  • 154% increase in the city
  • Over 250% increase in the county

Peak Season and Transmission

Norovirus thrives in cooler months, typically from November to April. This highly contagious virus spreads rapidly through:

  • Person-to-person contact
  • Contaminated food, water, or surfaces

Symptoms appear 12 to 48 hours after exposure and include:

  • Diarrhea
  • Vomiting
  • Nausea
  • Stomach cramps
  • Body aches
  • Fever

Prevention and Safety Measures

Health officials recommend the following precautions:

  • Wash hands frequently, especially after using the bathroom and before eating.
  • Thoroughly wash fruits and vegetables.
  • Cook shellfish properly.
  • Clean and disinfect surfaces, clothes, or linens immediately if someone gets sick, using a bleach-based cleaner.

Important Notes

  • Norovirus cannot survive above 60°C (140°F), but freezing does not kill it.
  • If you feel unwell, stay home and rest to prevent spreading the virus.
  • Good hygiene is your best defense against norovirus.

Stay Informed and Safe

Let's stay informed, stay safe, and beat this virus together.

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