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People who become infected with the Delta variant even after being fully vaccinated may still pass the virus on, undermining hopes of herd immunity, new research suggests.

Scientists at the University of Oxford found levels of the virus could be just as high in people who get COVID despite having both jabs as in those who haven’t been vaccinated.

Dr Koen Pouwels, one of the lead researchers of the study, said: “The vaccines are better at preventing severe disease and are less effective at preventing transmission.

“The fact that you see more viral load (with the Delta variant) hints towards herd immunity being more challenging.”

Scientists from the COVID-19 Infection Survey have conducted regular PCR tests on more than 700,000 randomly selected people since December last year.

Until mid-May, when the Alpha variant was the dominant form of the virus, the vaccines were highly effective at stopping infections.

But since then, a period when the more infectious Delta variant has dominated, the vaccines have been less able to block the virus.

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Professor Sarah Walker, Chief Investigator for the Survey, said: “We don’t yet know how much transmission can happen from people who get COVID-19 after being vaccinated – for example, they may have high levels of virus for shorter periods of time.

“But the fact that they can have high levels of virus suggests that people who aren’t yet vaccinated may not be as protected from the Delta variant as we hoped.”

The researchers stress that real-world data shows that the vaccines are still highly effective at reducing hospital admission and death.

Because volunteers in the study had regular PCR swabs and antibody tests the scientists were able to monitor immunity over time.

They found that two weeks after the second dose the Pfizer jab was 85% effective at preventing PCR-confirmed infection, considerably better than the AstraZeneca shot, which was 68% effective.

But the protection of the Pfizer jab waned more rapidly. Three months after the second dose it prevented 75% of infections, compared to 61% protection with the AstraZeneca jab.

“These two vaccines look like they are working in very different ways,” said Professor Walker.

“But it’s the rates of hospitalisations and deaths that we really need to keep our eye on.”

The study has been published as a pre-print and has not been peer-reviewed.

Dr Alexander Edwards, Associate Professor in Biomedical Technology at the University of Reading, said the results were “compelling”.

“Overall this study is excellent as it shows that although Delta is better at infecting vaccinated people than previous variants, the vaccines still work remarkably well.

“There are subtle differences between different vaccine types, and some changes over time, but they all work brilliantly.

“It does remain vital to remember that even if double jabbed, you can still get infected and pass the virus on.”

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Prof Paul Hunter, Professor in Medicine at the University of East Anglia, said: “There is now quite a lot of evidence that all vaccines are much better at reducing the risk of severe disease than they are at reducing the risk from infection.

“The main value of immunisation is in reducing the risk of severe disease and death and the evidence available shows that protection lasts longer against severe disease than against mild disease and all current UK vaccines are very good at this even against the Delta variant.”

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UK weather: Amber warning for snow issued – and temperatures could drop to -16C this week

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UK weather: Amber warning for snow issued - and temperatures could drop to -16C this week

An amber warning has been issued for snow in a part of the UK, likely to cause travel delays and “stranding some vehicles and passengers”.

The warning, which covers south west England, also warns some rural communities could become cut off and is in place until 2pm this evening.

Pic: Met Office
Image:
Pic: Met Office

There is also a yellow weather warning for snow covering the southern counties of England until midnight on Wednesday.

The warning stretches from Kent to Cornwall and up to south London and the Met Office said between 2cm and 5cm of snow could accumulate fairly widely, with as much as 10cm over higher ground.

This week is expected to see the coldest nights of the year, with temperatures potentially reaching -14C on Wednesday night and -16C on Thursday night, both in the North East of England and Scotland, the Met Office said.

Weather warnings issued on Tuesday for snow and ice covering the parts of Wales, the North West of England, west and northern parts of Scotland as well as Northern Ireland will remain in place until midnight tomorrow.

The forecaster said some roads and railways are likely to be affected and there could be icy patches on untreated roads.

Members of the public walk through heavy snowfall on the high street of Saddleworth.
Pic: AP
A woman walks through heavy snowfall on the high street of Saddleworth.
Pic: AP
Image:
Pics: AP

Meanwhile the Environment Agency has said at least 300 properties have flooded across England since New Year’s Eve. It estimates more than 41,000 properties have been protected.

Heavy rainfall over the New Year caused significant river and surface water flooding across the North West of England and Yorkshire and snowmelt has brought further disruption to parts of England, particularly the Midlands, the agency said.

Read more from Sky News:
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Man says flooding ‘came out of nowhere’

Floods minister Emma Hardy said: “My sympathies go out to the people, businesses and communities impacted by the recent flooding across the country.

“I want to express my heartfelt thanks for the vital work that the Environment Agency and emergency services are doing to keep people safe. People must continue to follow their advice and sign up for flood warnings.”

Flood warnings

Some 100 flood warnings were in force across England on Wednesday, with people urged to remain vigilant over the coming days.

A danger-to-life warning was issued on Tuesday morning for the River Soar near Barrow upon Soar, Leicestershire, but was later removed.

People living in caravan parks in the area were urged by the Environment Agency to act, with a large-scale evacuation needed to save lives.

Firefighters have rescued dozens of people across Leicestershire since Monday, Leicestershire Fire and Rescue Service said.

Hundreds of schools were closed across the UK, with road and rail links blocked, as Manchester, Bristol and Liverpool John Lennon airports suspended flights because of the conditions.

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UK Athletics and former games head of sport charged with manslaughter over Paralympian’s death

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UK Athletics and former games head of sport charged with manslaughter over Paralympian's death

UK Athletics Ltd and a former head of sport for a major London games have been charged with manslaughter following the death of Paralympian Abdullah Hayayei, the Crown Prosecution Service said.

United Arab Emirates athlete Mr Hayayei died aged 36 after a metal throwing cage fell on him while he was shot put training at Newham Leisure Centre in London in 2017.

The Paralympian was pronounced dead at the scene after he was struck by a metal pole in the incident.

He was training in preparation to represent his country in the shot put, discus and javelin at the World Para Athletics Championships which began in London later that week.

Teams and coaches from several nations were present at the time of the tragedy.

Keith Davies, 77, the former head of sport for the 2017 World Para Athletics Championships, has been charged with gross negligence manslaughter and a health and safety offence.

UK Athletics has been charged with corporate manslaughter and a Health and Safety at Work Act offence.

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Both UK Athletics and Davies are due to appear at Westminster Magistrates’ Court on Friday 31 January.

Malcolm McHaffie, head of the CPS Special Crime Division, said: “The Crown Prosecution Service reminds everyone that criminal proceedings are active and both UK Athletics Ltd and Davies have the right to a fair trial.

“It is extremely important that there be no reporting, commentary or sharing of information online which could in any way prejudice these proceedings.”

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The Met Police launched an investigation following Mr Hayayei’s death on 11 July 2017, with the Crown Prosecution Service saying today that it has authorised charges following a review of evidence provided by the force.

Mr Hayayei made his Paralympic debut in Rio de Janeiro in 2016 and was set to feature in his second World Championships in 2017.

Ed Warner, who was co-chair of London 2017, said after Mr Hayayei’s death: “This is a devastating event and everyone within the London 2017 Organising Committee is shocked and saddened.

“We will be working closely with all the competitors and teams over the days ahead to offer support wherever it is needed.”

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Boy, 14, stabbed to death on London bus named as Kelyan Bokassa

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Boy, 14, stabbed to death on London bus named as Kelyan Bokassa

The 14-year-old who was stabbed to death on a bus in southeast London yesterday has been named as Kelyan Bokassa.

He was stabbed to death on a bus in Woolwich Church Street, close to the Woolwich Ferry, just before 2.30pm on Tuesday.

The teenager died at the scene shortly after medical help arrived.

No arrests have been made so far but officers are appealing for witnesses who were on the 472 bus.

Police called the stabbing a “horrific attack”.

Detective Chief Inspector Martin Thorpe, who is leading the investigation, said: “Following Kelyan’s tragic death yesterday, specialist officers are now leading the investigation which is progressing at pace.

“If anyone saw this horrific attack or was in the area then I urge them to come forward and speak to officers.

“We’re particularly interested in any mobile phone footage that captured this incident or any dash cam or doorbell footage from around the surrounding area at the time of this incident.”

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