Rydym yn dilyn y cyngor gwyddonol diweddaraf fel rydym wedi'i wneud drwy gydol y pandemig. Ar ôl astudio'r dystiolaeth ynglŷn â brechlyn Pfizer/BioNTech a brechlyn Rhydychen/AstraZeneca, mae'r Cyd-bwyllgor ar Frechu ac Imiwneiddio wedi cynghori y dylem roi blaenoriaeth i roi'r dos cyntaf i gynifer o bobl mewn grwpiau sy'n wynebu risg â phosibl, yn hytrach na rhoi dau ddos o fewn cyn lleied o amser â phosibl.
We are following the latest scientific advice as we have throughout the pandemic. Having studied evidence on both the Pfizer/BioNTech and Oxford/AstraZeneca vaccines the Joint Committee for Vaccination and Immunisation (JCVI) has advised that we should prioritise giving as many people in at-risk groups their first dose, rather than providing two doses in as short a time as possible.