The proportion of children who were up to date with their routine immunisations by four years of age in Wales was 88% this year, the highest since this measure was first reported on.
Cyfran y plant a oedd wedi cael pob un o'u brechiadau arferol erbyn eu bod yn bedair oed yng Nghymru oedd 88% eleni, sef y gyfran uchaf ers i'r mesur hwn gael ei gofnodi gyntaf.