As countless Brits suffer grisly bouts of vomiting and diarrhea thanks to the norovirus , many will be wondering just how long it will take before they feel better. The highly-infectious bug , which is usually most prevalent during winter, has arrived early this year with NHS figures showing the virus surging almost 30 per cent between September and October. The main symptoms are nausea, sickness and diarrhoea, with some sufferers also experiencing a high temperature, headaches , and aching