The Children's Immunisation Centre has been criticised in the Senedd for offering single jabs for measles in Swansea and around the UK.
A spokesman for the clinic told ITV News: "MMR Jabs are fine for the majority of children but there are circumstances where the single vaccine has its place."
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.