Public Health Wales has reported that the number of measles cases has risen to 886, as children have gone back to school after Easter. 25-year-old Gareth Williams died during the epidemic, it has not been confirmed whether measles was the cause.
The report comes just before the government is due to outline a nationwide strategy to combat a potential measles epidemic.
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.