Stomach Bug December 2024. The stomach flu (norovirus) is an acute form of gastroenteritis, or inflamed stomach or intestinal lining caused by a virus, bacteria or parasite. According to cdc figures, more than 200 outbreaks of norovirus — which is sometimes referred to as the stomach flu or stomach bug, though it has no official ties to influenza.

I spent all night throwing up which seemed to be every two hours on the dot. Norovirus is a highly contagious virus that primarily affects the lining of some portions of the intestine and is the leading cause of vomiting, diarrhea and foodborne illness in the u.s.