The real reason child vaccination rates are falling

There's a reason child vaccination rates are falling - and it's not social media

Twenty-week-old Grayson easily could have become one of the tens of thousands of British babies left unvaccinated against polio.

His mother, Lily, agrees with the principle of immunisation. But overwhelmed by the early weeks of motherhood, and suffering from post-partum depression after a traumatic birth, she was daunted by the prospect of a long journey to a doctor's surgery. "I've been through the trenches, awake all night. You don't want to leave the house, or go to a different town."

Weeks ticked by, and eventually Grayson missed the polio and diptheria jabs he was supposed to get at eight weeks old. By that point he was officially classed by the NHS as "overdue" for vaccination; effectively, he was on his GP's naughty list.

Then Lily realised there was a clinic practically on her doorstep - at a location she hadn't expected.

That clinic - in Keighley, west Yorkshire - runs from a vacant retail unit at the Airedale shopping centre, a 1960s-era precinct that locals say has fallen on hard times in recent years, with plenty of empty, boarded-up units. The staff who created the clinic thought: why not use one of those vacant units to administer vaccines?

"This was an empty shop; there was nothing here, the windows were all blacked out," Flora Jennings, a local charity coordinator, tells me over the sound of a baby's laughter, on the morning I visit the clinic.

Dr Zoyah Hussain leads a walk-in vaccination clinic at the Airedale shopping centre, helping to boost the area's immunisation rates

It's an imaginative solution to a national problem. Over the last 15 years, childhood vaccination rates have fallen across Britain. The share of five-year-olds in England who have received a four-in-one jab (which protects against viruses like polio and tetanus) is now 81%, down from 89% in 2014. About 84% have received both of their recommended MMR (measles, mumps and rubella) jabs, down from 88% a decade ago.

"If you just look at the generalised population, the decline doesn't look horrific," says Prof Dan Hungerford, an epidemiologist at the University of Liverpool who gave evidence to Parliament on this topic. "But if you compare us to other nations, particularly our European neighbours, we are one of the worst-performing countries in terms of getting early-life vaccinations to children."

Politicians are now asking how Britain - the country of Edward Jenner, the "father of immunology" - could have allowed its immunisation rates to drop so low, and what could fix it.

One Labour MP on the Health Committee has gone further, telling the BBC that it's time to consider a policy that's commonplace in some countries, but still something of a taboo in Britain: mandatory childhood immunisations.

Before the 1800s, between 40% and 50% of children in Europe died before their 15th birthday. Now, in Britain that number is well below 1%, according to the UN.

Scientists broadly agree that vaccines were key to this improvement.

"Along with clean water and sanitation, immunisations have had a profound impact on keeping children alive," says Ben Kasstan-Dabush, a lecturer in global health policy at the University of Edinburgh.

And that's why some find it so worrying that Britain's rates have slipped. Last year alone saw measles outbreaks in parts of Birmingham, Bristol, and north London; so far this year, two children in England have died of the disease.

In January, MPs on the Health Committee described the backslide as "national disgrace".

Some blame the rise of misinformation on social media. Last year, a group of American scientists found that reading just one anti-vax Facebook comment about the HPV jab - given to teenagers - was enough to make some parents hesitate.

But all of the public health experts who spoke to the BBC said that whilst anti-vax social media sentiment plays its part, they don't think it's the main reason immunisation rates have slipped.

Instead, they point to something more mundane: they think that parents of young children simply have fewer face-to-face contacts with medical professionals than they did 10 or 15 years ago.

Child vaccinations are a key reason infant mortality fell over the 20th Century, scientists say. Above, children at a south London vaccination clinic in 1956

Beccy Baird, a senior fellow at the King's Fund think tank, says that despite colourful media reporting around "anti-vaxxers", most parents who turn down vaccination are not ideologically opposed to it. Convenience plays a big role, she says; vaccination rates are highest when parents regularly interact with medics, who can remind them to get their children jabbed and tell them exactly where to do it.

And those interactions have become rarer. England has seen a 45% decline over the last decade in the number of health visitors (nurses and midwives who treat young children at their home), according to BBC analysis. It's part of a health visitor's job to remind parents about vaccines and, in some cases, administer jabs directly.

And over roughly the same period, the number of fully trained GPs in England struggled to keep up with rising patient demand, according to British Medical Association data; while the Nuffield Trust think tank suggests that patients have become less likely to see the same GP on repeated visits - meaning families don't build trusted relationships with doctors they recognise.

"Those touch points have become fewer," says Kasstan-Dabush.

At Keighley's shopping centre, inside the vaccination clinic, nurses are passing around biscuits.

"The kitchen's there, the playpen's there," says Jennings as she points to a soft-play where parents can leave children while their siblings are vaccinated. "I wanted it to be really inviting, almost like you're walking into someone's home."

The idea of opening a vaccination clinic inside a town centre shopping arcade seemed odd to some of the staff when it was first suggested.

Now, they say it's key to the clinic's success. "We need to make it simple, we need to put services where people come," says Jennings. It means they can catch casual shoppers who "pop their head around the door" and decide on a whim to get their child vaccinated.

"We're right in the centre. And down here it's flat, so you don't have to push a pram up a hill." She says some parents simply won't attend a clinic if it involves more than one bus.

And in the families come. Over the morning, the clinic vaccinates 10 infants, some of whom are classed by the NHS as "overdue". In many cases, the parents actually turn up to use a different service, like baby weighing, but once they are inside, lead GP Dr Zoyah Hussain gently suggests an immunisation - and most parents say yes.

"I do get a lot of questions… 'why do we need to give them jabs?', 'why don't we just let nature manage itself?'," Hussain says.