Given that we have been running a campaign since October to encourage vulnerable groups such as pregnant women and the elderly to get vaccinated, it is natural that stocks will run down over time.
Gan ein bod wedi bod yn cynnal ymgyrch ers mis Hydref i annog grwpiau sy'n agored i niwed, fel menywod beichiog a'r henoed, i gael eu brechu, mae'n naturiol y bydd y stociau'n prinhau dros amser.