It comes after Health Minister Eluned Morgan accepted the JCVI advice to give another boost to people who are at higher risk of severe COVID-19.
Daw hyn ar ôl i Eluned Morgan dderbyn cyngor y Cyd-bwyllgor ar Imiwneiddio a Brechu (JCVI) i roi brechiad atgyfnerthu arall i bobl sy’n wynebu risg uwch o gael COVID-19 difrifol.