Health officials in England have launched a campaign to immunise a million children, aged between 10 and 16, with the MMR vaccine following an outbreak in Wales. They warned further measles outbreaks could occur 'anywhere'.
Special clinics are being set up in schools and GP surgeries at a cost of £20 million. There's already been a worrying rise in cases in the north-east and north-west.
Medical Editor Lawrence McGinty reports: