Stomach Flu 2025 Florida. Diarrhea, stomach pain and vomiting typically begin 12 to 48 hours after exposure. Norovirus infection symptoms usually last 1 to 3 days.
Viral gastroenteritis, also known as stomach flu, can cause vomiting, diarrhea, cramping, and dehydration. The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite.