Abertawe Bro Morgannwg University Health Board will offer MMR vaccines for pupils at comprehensive schools in Bridgend from 7 May.
There will be a fourth round of drop-in MMR clinics at the area's four main hospitals - Singleton and Morriston in Swansea, Neath Port Talbot and the Princess of Wales in Bridgend - on Saturday.
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.