2024 Stomach Bug. In this case, a virus causes the stomach flu, and when you come down with the stomach flu, the symptoms. Norovirus, commonly known as the winter vomiting bug (although it can strike at any time of year), is a stomach bug that causes sickness.
The u.s.’s most prevalent stomach bug. — norovirus—more commonly known as the stomach bug—is on the rise in the northeast region of the u.s.