Doctors in the Preston area are urging people to be on the lookout for symptoms of Norovirus and take precautions in case they suffer a bout this winter.
Norovirus, sometimes known as winter vomiting disease, usually peaks during January.
It is highly contagious and the most frequent cause of infectious gastroenteritis.
Typical symptoms are vomiting and diarrhoea and you can also get a temperature, headache, aching limbs and stomach cramps.
Dr Ann Bowman, chairman of NHS Greater Preston Clinical Commissioning Group, said: “If someone suspects they have Norovirus they should ensure they do not visit hospitals, schools or care homes to reduce the risk of them passing it on to others. They should also avoid work until they have been free of diarrhoea and vomiting for at least 48 hours.”