The diarrhoea and vomiting bug norovirus has spread to five hospitals across north Wales, with 31 patients falling ill, a health board says.
Visitors are being urged to help stop the infection at Ysbyty Gwynedd, along with Dolgellau, Colwyn Bay, Glan Clwyd and Wrexham Maelor hospitals.
Betsi Cadwaladr University Health Board says there are restrictions on admissions at eight wards.
The number of norovirus infections in the UK is at higher levels than normal.
BBC News
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