Dorset County Hospital in Dorchester is currently under increased demand.
People are now being urged to keep up good hygiene and to make sure they are contacting the correct healthcare professionals for their condition.
A spokesperson for DCH said: “Wash your hands often and thoroughly with soap and warm water, especially after using the bathroom or before eating. Hand sanitiser doesn’t kill all bugs.
“Being prepared for common illnesses and injuries is really important. Make sure you have things like things like pain relief, antihistamines, decongestants and cold and flu remedies, antiseptic and plasters so you can be ready if you or a family member feels poorly or suffers a minor injury.
“For expert advice on minor health issues and medicines. Pharmacists are highly qualified and can advise if you need another NHS service. For some common conditions, your pharmacist can now provide treatment and some prescription medicine, if needed, without seeing a GP.
“If you have an illness that won’t got away after self-care or advice from the pharmacy, call your GP surgery. If it’s urgent and your GP surgery is closed, call NHS 111 and they will make sure you get the care you need.
“If you are ill or injured and not sure where to turn, call NHS 111 or visit 111 online. This is a 24/7 service.
“If you have flu, an upset tummy or COVID symptoms, please avoid visiting our hospital. We understand that patients in hospital want to see their family and friends, but it is extremely important that anyone who is feeling unwell or has been experiencing diarrhoea or vomiting be clear of any symptoms for at least 48 hours before visiting.”
People are urged to only call 999 or go to the Emergency Department for life-threatening or serious conditions like heavy bleeding, unconsciousness or difficulty breathing.
The spokesperson added: “If you have a relative in hospital, work with staff to help them return home safely and quickly. Support is available through NHS community services and adult social care teams.”