Today, the four UK Chief Medical Officers have agreed that the UK is now at the highest level of risk, Joint Biosecurity Council level 5.
Heddiw, mae pedwar Prif Swyddog Meddygol y DU wedi cytuno bod y DU bellach ar y lefel uchaf o risg, gyda'r Cydgyngor Bioddiogelwch ar lefel 5.