The 4 Chief Medical Officers agree with the JCVI advice and the 4 nations of the UK have subscribed to implementation of the advice.
Mae Prif Swyddogion Meddygol pedair gwlad y DU wedi cytuno â chyngor y Cyd-bwyllgor ar Imiwneiddio a Brechu ac mae pedair gwlad y DU wedi cytuno a gweithredu ar y cyngor.