As of 29 October 2021, the self-isolation criteria have been updated for household contacts who are fully vaccinated or aged between 5 and 17.
Ar 29 Hydref 2021, cafodd y meini prawf hunanynysu eu diweddaru ar gyfer cysylltiadau cartref sydd wedi'u brechu'n llawn neu sydd rhwng 5 a 17 oed.