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.
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.