Doctors are encouraging people to prepare for the return of the 'winter vomiting' bug.

Epsom and St Helier Trust is warning residents the seasonal virus is very infectious and outbreaks commonly occur in schools and offices.

Dr Sharon Chambers, consultant microbiologist and the lead doctor responsible for the control and prevention of infections, said: “The symptoms of a norovirus usually start between 24h to 48h after the initial infection, although they can start after as little as 12 hours.

“The first symptom is usually a sudden onset of nausea, which is followed by projectile vomiting and watery diarrhoea. Some people may also have a mild fever, headaches, stomach cramps, or aching limbs.”

Although Epsom and St Helier Trust has yet to see cases of norovirus in its hospitals this year, the virus can easily be brought on to wards by visitors.

Dr Chambers said: “We are starting to see the first reports of norovirus in the community and the weather has certainly turned colder, so we’re encouraging local people to take precautions.

"Because norovirus spreads so easily, those with diarrhoea and vomiting should remain at home until 48 hours after symptoms have stopped. Personal hygiene must also be good so please make sure you wash your hands thoroughly with soap and water before eating and after going to the toilet."

People who have the norovirus can expect the symptoms to go away within one to three days. If they are still feeling ill after this time, they should contact their GP or call NHS Direct on 0845 46 47 for advice.