Public Health Wales has reported that the number of measles cases has risen to 886, as children have gone back to school after Easter.
There have been 78 new cases since last Thursday with 80 people admitted to hospital since the start of the outbreak.
Doctors are urging people to get their kids vaccinated, as a second outbreak has emerged in the North East of England where there are already more than 200 cases.
A man who died in from a suspected case of measles in Wales was infected with the disease at the time of his death, health officials said.
A mother convinced the MMR vaccine led to her son's autism has not immunised her daughter, despite the link being disproved.