O ddydd Sadwrn (27 Tachwedd), mae brechiadau atgyfnerthu COVID-19 wedi cael eu cynnwys ar y ffurf ddigidol o Bàs COVID y GIG, er mwyn i bobl yng Nghymru allu dangos tystiolaeth eu bod wedi cael dos atgyfnerthu os ydynt yn teithio dramor.
From Saturday (27 November), COVID-19 vaccination boosters, have been added to the digital NHS COVID Pass so people in Wales are able to demonstrate proof of a booster if they are travelling overseas.