Public Health Wales says that they are now considering offering vaccinations in schools.
Dr Richard Roberts, who is head of the vaccine programme says that their 'main aim' is to get children at the "top of primary school and in secondary school" vaccinated.
He told ITV News "there are more of those children who've missed out on the MMR vaccine than the younger children."
All the general practitioners are able to offer MMR, so anybody can go along to their own general practice, make an appointment and get the MMR jab.
It's also being offered over the weekend in hospitals and that's planning to be repeated and there are further plans being considered for offering it in other ways, for example through schools.
It's those parents who've only had one dose, which offered 90 per cent protection, but it's important to have that second dose.
Particularly parents whose children who've had no vaccination at all - it's very important they come forward and get vaccinated.
2013 is expected to be the worst year for measles in the UK for the past two decades. Read more about the illness and how it is treated.
If the Government's top adviser on immunisation thinks the risk of an emergency in England is a possibility, I believe him.