Public Health Wales will release the latest measles outbreak figures today. The number of confirmed cases reached 1,011 on Tuesday.
Around 4,000 children and young people aged between 10 and 18 have received the MMR vaccine in the Swansea area in the past month.
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.