A healthcare worker infected with Hepatitis C is known to have transmitted the virus to two patients.
Now, further patients who may have been treated by them are being contacted and offered advice and blood tests.
The healthcare professional worked at:
- Caerphilly District Miners’ Hospital, between May 1984 and July 2003
- East Glamorgan Hospital, in Pontypridd, between 28 May 1984 and 17 July 1984
- Maelor General Hospital, in Wrexham, between 15 May 1978 and 27 June 1978
More top news
A family has issued an appeal to help find their missing pet turkey - in case he gets gobbled up as someone's Christmas dinner.
A blustery start to the weekend with sunny spells and scattered showers.
Welsh Secretary Stephen Crabb has launched an attack on Labour leader Ed Miliband, saying he "doesn't give a toss about Wales".