Stomach Bug Going Around December 2024. Learn how to recognize the symptoms, protect yourself and others,.  — norovirus, the leading cause of acute gastroenteritis, is still spreading across the u.s.

 — the bug, which causes intense but blessedly short episodes of vomiting and diarrhea — with or without a brief period of fever, chills, and body aches — has been on. Diarrhea, vomiting, nausea, and stomach.