STATEN ISLAND, N.Y. — Norovirus, also known as the stomach flu, rang in 2025 in a big way across the United States, and continues to surge. The highly contagious virus causes vomiting and diarrhea, ...
Norovirus is technically a group of viruses that cause acute gastroenteritis, or an inflammation of the stomach and intestines that leads to intense diarrhea, vomiting and stomach cramps.
What's behind the spike in norovirus cases? Cases went down during the pandemic, likely due to better hand hygiene. This spike is likely due to people returning to our old, nasty habits.