Mae profion wedi’u cynnal ar gyfer unigolion asymptomatig ym Mhen-y-bont ar Ogwr, Merthyr Tudful a Rhondda Cynon Taf ers dechrau mis Mawrth ac mae cynlluniau hefyd ar y gweill yn Ynys Môn mewn ymateb i’r brigiad o achosion yng Nghaergybi.
Asymptomatic testing has been taking place in Bridgend, Merthyr Tydfil and Rhondda Cynon Taf since the beginning of March with plans also progressing in Anglesey in response to the outbreak in Holyhead.