56 new cases have been reported in the measles outbreak since Tuesday, bringing the total number to 942.
Public Health Wales says 83 people have now been hospitalised since the outbreak started.
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.