TWELVE hospital wards in Swansea remain closed to visitors due to a diarrhoea and vomiting outbreak.
The advice from health chiefs is to stay away from hospitals if you are ill with a tummy bug, or have recovered from one in the last few days.
Norovirus gastroenteritis is a common cause of tummy upsets and is more prevalent in winter months.
The incubation period is anything from 24 hours to three days, and symptoms usually last 12 to 60 hours. The onset is sudden.
People usually get over it within two or three days, but remain infectious for 48 hours, and even up to 72 hours after symptoms stop.
Antibiotics have no affect on viruses, including norovirus. The illness needs to run its course.
Nicola Williams, assistant director of nursing at Abertawe Bro Morgannwg University Health Board, said: "If you have sickness or diarrhoea, stay at home for at least 48 hours from the last time you were sick or had diarrhoea.
"Even if your symptoms have stopped, don't be tempted to pop to the shops, go back to work or school, or have friends visit before the 48 hours are up. We are especially asking that you don't visit friends or relatives in hospital as you could still pass the virus to other people during this time.
"Also, if you've been looking after someone who has diarrhoea or vomiting, please do not visit hospital for 48 hours after the last symptom was experienced. Even if you haven't got any symptoms, you could be carrying the infection and pass it on to patients in the hospital.
"Everyone can help reduce the spread of the bug by washing their hands thoroughly after going to the toilet and before handling food."Ward closures listed in Swansea due to norovirus:
Morriston Hospital: Ward C, Ward D, Ward H, Ward S, Ward T, CDU and Gower.
Singleton Hospital: Ward 7, Ward 8, and Ward 9.
Cefn Coed Hospital: Dyffryn Unit.
Ystradgynlais Hospital: Tawe Ward.
Princess of Wales Hospital, Bridgend: Ward 2, Ward 8, Ward 19, Ward 20.
The Post asked Hywel Dda Health Board for an update on its ward closures, but did not receive a response.