In 2012 and 2013 outbreaks of measles occurred in large numbers of children and adults who had been vaccinated and who were living in areas of highly vaccinated populations in the North of England. The North of England outbreaks involved the same MMR vaccine in use in the USA, Merck’s MMR II.
Instead of warning parents in the North that their children were at risk and taking precautionary measures, nothing was said. The British public were not told the MMR vaccine was failing to protect children from measles.