Ers inni adolygu’r rheoliadau ddiwethaf, mae’r amrywiolyn Omicron newydd wedi dod i’r amlwg. Dyma amrywiolyn o’r feirws sy’n lledaenu’n gyflym, gyda nifer o fwtaniadau – er bod gennym lawer i’w ddysgu eto am yr amrywiolyn hwn, mae’n ddatblygiad sy’n peri pryder yn y pandemig.
Since we last reviewed the regulations, the new omicron variant has emerged. This is a fast-moving variant of the virus, with many mutations – while there is still a lot we do not know about this variant, it is a worrying development in the pandemic.