Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. “But even healthy adults can get really sick from it because it’s so contagious.”What are the symptoms of norovirus? “Common symptoms of norovirus include nausea, diarrhoea, and vomiting,” said Dr Sharma. “The key is to stay hydrated by drinking plenty of fluids, especially if you’re vomiting or have diarrhoea,” advised Dr Tang. “If someone around you has norovirus, it’s best to avoid direct contact and be extra on top of your hygiene.