It starts suddenly: When a stomach bug strikes out of nowhere, noroviruses are often the culprits. Here, we answer the most important questions about this unpleasant virus. How is norovirus ...

Add Yahoo as a preferred source to see more of our stories on Google. Stomach bugs are very common and usually pass quickly. (Getty Images) (LaylaBird via Getty Images) By October, the back-to-school ...

A 24-hour stomach bug is a viral infection, like norovirus, that spreads through contact with sick people or contaminated food and surfaces. Symptoms include diarrhea, vomiting, and fever that usually ...