Public Health Wales is urging young people to get the MMR vaccination before the start of their exams.
The increase of cases shows that the outbreak is not easing up, especially in the 10 to 18 year old age group.
Young people have important examinations coming up and we need to make sure that those aged between 10 and 18 are vaccinated so their preparation for these examinations are not affected.
Vaccination sessions are continuing in schools throughout Wales and I urge pupils and their parents to take advantage of these.
We have seen that measles can be potentially fatal and no one should be complacent about the severity of measles. It can kill but can be prevented by a simple, safe vaccine.
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.