Since the world’s first Covid-19 vaccine was administered in the UK in December 2020, more than 139m doses have been administered as part of the largest ever vaccination programme in UK history.
Ers i frechlyn Covid-19 cyntaf y byd gael ei weinyddu yn y DU fis Rhagfyr 2020, mae dros 139 miliwn o ddosau wedi’u gweinyddu fel rhan o’r rhaglen frechu fwyaf erioed yn hanes y DU.