Patients with symptoms of the Norovirus are being asked to stay away from Leighton Hospital in Crewe, after admissions exceeded the average.
In a statement the trust said: "The Trust isencouraging members of the public to only use its Emergency Department forserious and life-threatening conditions such as heart-attacks, strokes, seriousaccidents and breathing difficulties.
"Self-care is oftenthe best choice to treat common illnesses and complaints such as coughs, colds,sore throats, upset stomachs and aches and pains, all of which can often betreated with a well-stocked medicine cabinet and plenty of rest.
"For expert advice and treatment, without the need to wait for a GP appointment, local pharmacies are able to provide a confidential service, as can NHS 111 and the NHS Choices website www.nhs.uk. NHS Choices can also help you locate your nearest NHS services such as GPs, dentists and pharmacies."