New figures show that although there has been an increase in the number of children in Wales who were given the MMR vaccine last year, take-up is still below target levels.
According to data released by the National Public Health Service for Wales (NPHS), rates for almost all vaccines stayed the same or increased in 2006-07.
But the group said that while the take-up of 76.5% for the second dose of the MMR vaccine is the best that has ever been recorded, it is still well below the 95% target.
Rates for the first dose of the vaccine, given to children before they are two, increased to 87.7% from 86.3% the previous year.
Meanwhile, take-up of the five-in-one baby jab for diphtheria, tetanus, whooping cough, polio and Hib increased to 95.3%, beating the 95% target for the first time.
Wales's Chief Medical Officer Dr Tony Jewell said: "I am particularly pleased that the uptake of the five-in-one vaccine has exceeded the national target.
"However, the report also shows that while vaccination rates are increasing, we need to ensure that children are up-to-date with their immunisation before entering school, including MMR, particularly in light of the rising incidence of measles in school in the UK this year."