The proportion of children who were up to date with their routine immunisations by four years of age was 88% this year, the highest since this measure was first reported on.
Roedd cyfran y plant a oedd wedi cael eu himiwneiddiadau rheolaidd erbyn eu bod yn bedair oed yn 88.0% eleni, yr uchaf ers adrodd ar y mesur hwn am y tro cyntaf.