Yn wreiddiol, cynghorodd Prif Swyddog Meddygol Cymru’r rhai a oedd fwyaf agored i effeithiau mwyaf difrifol COVID 19 i'w gwarchod eu hunain am gyfnod o 12 wythnos. Daw’r cyfnod cychwynnol o 12 wythnos i ben ar 15 Mehefin ac mae Prif Swyddog Meddygol Cymru bellach wedi cadarnhau'r camau nesaf ar gyfer y grŵp hwn o bobl.
The Chief Medical Officer for Wales initially advised those who were most susceptible to the most serious effects of COVID 19 to shield for a period of 12 weeks. That initial 12 weeks comes to an end on 15 June and the Chief Medical Officer for Wales has now confirmed the next steps for this group of people.