There have been 43 measles cases in Gloucestershire over the past six months - one of very few areas in the West Country to have confirmed cases of the disease.
The government has announced a vaccination catch-up programme for 10 to 16 year-olds who weren't vaccinated during the MMR scare.
Devon has had thirteen measles cases over the last six months - one of the highest county totals in the South West.
The government has announced a catch-up programme for 10 - 16 year-olds who weren't vaccinated during the MMR scare.
Experts say unprotected young people should get at least one dose of the jab.
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The capital has the lowest level of MMR vaccination take up in the country, and this puts it at particular risk of suffering a measles outbreak.
With the number of cases of the disease already rising, Public Health England are so concerned they're launching a catch-up vaccination programme.
They're particularly concerned about those aged 10-16 who may have missed out on the vaccine in the wake of the Andrew Wakefield scandal.
There have so far been 68 cases of measles in the capital so far this year- compared to just 137 for the whole of last year.
Professor David Salisbury from the Department of Health told ITV News there was no emergency over measles yet, but action was needed to prevent one.
Speaking to ITV News, Dr Paul Cosford of Public Health England said the campaign would give England the opportunity to eliminate measles. He said the NHS would work with GPs to identify the people most at risk.
We have this legacy of older children who were not vaccinated as toddlers and these young people are now secondary school age. So they are now at the position where they can spread infection very effectively.
Our concern is that we have a potential for school outbreaks in many areas of the country - probably the areas most likely to be affected would be London and the South and East of the country where we know that the historical coverage was not as high as it was in the northern parts of the country.
The campaign breaks down the million young people who will be offered the jab into three groups:
- First priority will be the third of a million 10 to 16-year-olds who are totally unvaccinated
- Second priority are the third of a million who need at least one further MMR jab to give them maximum protection
- Third priority are the estimated third of a million children above and below this age group who need at least one further MMR vaccination
The jump in the number of confirmed cases of measles has mainly been attributed to the number of 10 to 16-year-olds who missed out on vaccination in the late 1990s and early years of 2000.
At the time, there were fears of a link between autism and the MMR vaccine, which has since been discredited.
The MMR vaccine is offered to children when they are 12 to 13 months old giving 95% protection. A second dose is given at around three-and-a-half-years-old which boosts the level of protection to 99%.