Yr wythnos diwethaf, Cymru oedd y wlad gyntaf yn y byd i dderbyn cyflenwadau o’r brechlyn, a heddiw Cymru yw un o’r cyntaf i ddechrau diogelu pobl rhag coronafeirws.
Wales was the first country in the world to receive supplies of the vaccine last week, and has today become one of the first to begin protecting people against coronavirus.