More than 1,100 MMR vaccinations have so far been given today at emergency sessions at four hospitals around Swansea.
The headline rate rose to 808 on Thursday after 43 separate new cases of measles were recorded over a two day period.
Up to 2,000 more children were vaccinated in school this week as efforts were targeted in communities most at risk.
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.