Secondary school children have rolled up their sleeves to receive the MMR jab in Teesside, one of the areas worst affected by the measles outbreak.
Around 70 children, more than 10 percent of the pupils at All Saints School in Ingleby Barwick, received the jab in the dinner hall after their parents consented.
Professor Peter Kelly, chairman of the Tees Outbreak Control Team, said there were 186 confirmed cases on Teesside since the new year, with a similar number suspected.
"It's quite a serious problem on Teesside," he said. "We have been aware of it since it started in mid-January and we have been working with our GP colleagues."We wrote to parents six or seven weeks ago to advise them to take their children, if they weren't vaccinated, to the GPs.
"We felt the extra step of coming to schools would give us that really comprehensive coverage of children we need to catch."There is a myth that it is just a childhood illness. People can be very poorly with measles and there can be some very serious complications."
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.Read the full story ›
A school based measles vaccination programme has started in schools across Teesside, after the number of cases increased again.
There have been 150 confirmed cases of measles in the North East since the recent outbreak.
Almost all the reported cases are on Teesside, with just three in County Durham and none in Newcastle or Gateshead.
The NHS is advising people to contact their GP about vaccinating their children, or to take advantage of the schools programmes.
One million children will be targeted in a measles vaccination drive across England as an outbreak in Wales continues to grow.
ITV News Science and Medical Editor Lawrence McGinty reports:
15 cases of measles have been recorded in the East Midlands in the first three months of this year.Read the full story ›
13 cases of measles have been recorded in the West Midlands in the first three months of this year.Read the full story ›
Public Health Wales is urging young people to get the MMR vaccination before the start of their exams.
The increase of cases shows that the outbreak is not easing up, especially in the 10 to 18 year old age group.
Young people have important examinations coming up and we need to make sure that those aged between 10 and 18 are vaccinated so their preparation for these examinations are not affected.
Vaccination sessions are continuing in schools throughout Wales and I urge pupils and their parents to take advantage of these.
We have seen that measles can be potentially fatal and no one should be complacent about the severity of measles. It can kill but can be prevented by a simple, safe vaccine.
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.
Deputy Prime Minister Nick Clegg has urged parents to overcome their apprehension about the MMR jab.
Speaking to LBC 97.3 Radio, he said: "I really would urge parents, whatever your misgivings, do what people who know about this most say is right for your children - get that course of jabs done."
The Government is launching a £20 million campaign to vaccinate a generation of children thought to be the cause of a measles outbreak.
This year is on course to be the worst year for measles outbreaks in two decades.
Already, in the first three months there have been 587 cases in England.
For more information visit the Get Vaccinated England Facebook page.