Stomach Flu December 2025. State health departments participating in norostat have 7 business days to report norovirus outbreaks to cdc. The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite.

Stomach flu is actually viral gastroenteritis, a viral infection in your digestive system. My toddler started with a stomach flu two.