There are growing fears over the number of children diagnosed with measles in South Wales.
Daybreak's Health Editor Dr Hilary said that there are thousands of children across the country who did not have the MMR jab due to health scares in the 1990s. He added:
There is a big reservoir of children who have not been vaccinated or even those who haven't had a second dose, and they are vulnerable.
Parents should be asking "did my child have the MMR, and if not can they have it now?" because they are at risk.
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.