What kind of Norovirus symptoms should you look out for? Well, nausea, diarrhoea and vomiting are the main factors, though people might also experience headaches, pain in the arms and legs, and a high temperature. The virus is typically at its most infectious from the start of symptoms and then for around 48 hours after symptoms have stopped. It’s recommended to stay at home during this time so as not to infect anyone else.