Almost 2,500 doses of MMR have been given in GP surgeries in Wales in the last week, according to Public Health Wales (PHW).
Cases in the outbreak centred on the Swansea area have now reached 1,158.
PHW officials said almost 2,500 non-routine MMR jabs have been given out within the past week.
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.