Rhaid i bawb hefyd barhau i hunanynysu os ydynt yn profi’n bositif am y coronafeirws ond mae Llywodraeth Cymru wedi lleihau’r cyfnod hunanynysu o saith diwrnod i bum diwrnod llawn.
Everyone must also continue to self-isolate if they test positive for coronavirus but the Welsh Government has reduced the self-isolation period from seven to 5 full days.