Stomach Bug Going Around August 2024. Norovirus, commonly known as the winter vomiting bug (although it can strike at any time of year), is a stomach bug that causes sickness and diarrhoea. The main symptoms are nausea, vomiting, diarrhea, and/or stomach.

Gastroenteritis can be caused by viruses, most commonly norovirus, bacteria and parasites. What’s more, lots of viruses, like influenza and some others you might not.