Feb 21, 2026

Highly Contagious Stomach Virus Detected in New York Wastewater

4 December, 2025, 4:30 am

Health researchers have identified traces of norovirus, a fast-spreading stomach illness, in wastewater samples across New York, raising concerns about a possible return of the virus that affected many residents last winter.

Norovirus, often called the stomach flu, can cause sudden vomiting, diarrhea, nausea, and stomach pain. According to recent wastewater monitoring results, genetic markers of the virus were found in samples from Ithaca and Oswego wastewater treatment facilities. The levels detected in Oswego rose sharply in early November, suggesting increased activity in that area.

Despite the findings, health officials say there has not been a significant rise in reported cases so far this winter. The wastewater results serve as an early warning system, signaling where outbreaks might emerge before symptoms spread widely in the community.

What to Know About Norovirus

Symptoms usually begin 12 to 48 hours after infection and may also include fever, headache, and body aches. Most people recover within one to three days, but the virus can still be spread for up to two weeks after symptoms end. Dehydration is the most common complication, especially for young children and older adults.

How the Virus Spreads

Norovirus is extremely contagious and can spread through:

  • direct contact with an infected person
  • sharing food, drinks, or utensils
  • eating food prepared by someone who is sick
  • touching contaminated surfaces and then touching your mouth

Prevention Tips

Health experts recommend:

  • washing hands with soap and water for 20 seconds
  • cooking seafood thoroughly and rinsing fresh produce
  • disinfecting commonly touched surfaces
  • washing soiled clothing in hot water
  • staying home for 48 hours after symptoms stop

Treatment

There is no specific medication for norovirus. Antibiotics do not work because the illness is caused by a virus, not bacteria. Doctors advise drinking plenty of fluids to prevent dehydration and seeking medical care if symptoms become severe.

Public health officials will continue to monitor wastewater trends to track the virus through the winter season.