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Health Secretary Matt Hancock has not ruled out banning unvaccinated children from school following similar measures taken in US states, France and Italy.

The health secretary Matt Hancock said he "wouldn't rule out anything" when asked whether unvaccinated children should be banned from entering schools.

Speaking on Talk Radio, Mr Hancock said the UK was "not there yet" when it came to issuing a ban.

Mr Hancock was speaking on Julia Hartley-Brewer's breakfast show after new figures from Unicef showed that over half a million children in the UK were unvaccinated against measles between 2010 and 2017.

He said he was very worried about the issue, adding: "It's a responsibility on everybody to get vaccinated."

Mr Hancock was asked by Ms Hartley-Brewer if he'd consider meeting the Education Secretary, Damian Hinds, to discuss "following in the footsteps" of France and the US.

He replied: "I wouldn't rule out anything but I don't think we're there yet.

"In America they tried to do this and the courts stopped them so it can be complicated, but really it's people's responsibility as a parent to do the right thing - the right thing for their own children as well as, of course, the right of the community that everybody lives in."

A ban on unvaccinated children in public places in Rockland County, New York, which has experienced a measles outbreak, was put on hold earlier this month after parents challenged the decision.

But last week, a Brooklyn judge upheld an emergency order which said people living in certain parts of Williamsburg, Brooklyn, must get vaccinated amid a measles outbreak there.

Earlier, Mr Hancock said the rise in people not vaccinating had to be tackled, and that he was "particularly worried" about the spread of anti-vaccination messages online.

He told BBC Radio 4's Today programme that he was meeting social media companies on Monday to "require that they do more to take down lies that are promoted on social media about the impact of vaccinations".

Asked whether children who have not been vaccinated for measles should be excluded from schools, Prime Minister Theresa May's official spokesman said: "I haven't seen anyone suggesting that."

Unicef's analysis shows that increasing numbers of youngsters around the world are being left unprotected against measles, which can cause disability and death.

Its report showed that an estimated 169 million children around the world missed out on the first dose of the measles vaccine between 2010 and 2017 - an average of 21.1 million a year.

Simon Stevens, chief executive of NHS England, said: "Getting yourself and your children vaccinated against killer diseases is essential to staying healthy, and vaccine rejection is a serious and growing public health time bomb.

"With measles cases almost quadrupling in England in just one year, it is grossly irresponsible for anybody to spread scare stories about vaccines, and social media firms should have a zero-tolerance approach towards this dangerous content."

A list of 10 high-income countries, published by Unicef, shows the US has the highest number of children missing out on their first dose of the vaccine.

Between 2010 and 2017, some 2,593,000 youngsters in the US did not have their first dose of the vaccine.

The second most affected country was France, with 608,000 unvaccinated children over the same time period, followed by the UK, with 527,000.

Other countries including Argentina, Italy, Japan, Canada, Germany and Australia also made the top 10.

Children need two doses of the vaccine for protection, with the World Health Organisation (WHO) recommending 95% coverage to achieve herd immunity, which offers protection against the disease spreading in the community.

In the UK in 2017, there were 259 measles cases in England, rising to 966 in 2018.

In 2016 and 2017, uptake of the first dose of the MMR vaccine in five-year-olds in the UK exceeded 95% for the first time.

However, two doses of MMR vaccine are required to ensure full protection from measles.

Uptake of the second dose of MMR in five-year-old children is 88% - well below the 95% WHO target.

Figures from October to December 2018 show nine out of 10 children received their first dose by age two, rising to 95% at age five.

By age five, 87% had had their second dose, the quarterly figures showed.

Mary Ramsay, Public Health England's head of immunisations, said: "The UK achieved WHO measles elimination status in 2017, so the overall risk of measles to the UK population is low.

"However due to ongoing measles outbreaks in Europe, we will continue to see cases, particularly in unimmunised individuals.

"This could lead to some spread in communities with low MMR coverage and in age groups with very close mixing.

"Measles can be extremely serious, so make sure you and your family are protected."

Globally, 85% of children received their first dose in 2017 and 67% got the second dose.

Unicef said the rates reflected "lack of access, poor health systems, complacency, and in some cases fear or scepticism about vaccines".

Additional reporting by PA.