" Norovirus is a form of gastroenteritis that causes vomiting and diarrhea. It is very common and highly contagious. AFC Urgent Care Waltham can help you understand the causes and prevention of norovirus to help keep your loved ones safe. Learn more about the types of illnesses our trained physicians can help diagnose and treat here. What are the symptoms of norovirus? Norovirus is the most common form of gastroenteritis, so its symptoms are very similar ...