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The first detailed studies of the P.1 variant suggest it may be up to twice as transmissible.
Experts say most cases involve genuine but misplaced health anxieties, not faked illness.
The UK will soon be in a "very different world", government scientists promise after the success of the jabs.
Rapid tests will give confidence that schools can open safely, a government science adviser says.
Older French patients can now get the jab, which had been initially limited to those aged under 65.
The study measured infection rates in school staff and pupils in November and December.
The whereabouts of one infected person is unknown, as they did not give their full contact details.
The UK has 7.3 critical care beds per 100,000 people, compared to Germany's 33.8 and the US's 34.3.
The milestone is a "huge national achievement" and "every jab makes a difference", Boris Johnson says.
Schoolchildren's household and bubble members will be offered Covid tests to take at home twice a week.
Infection rates are declining overall, but some regions are seeing a rise in cases.
There is growing speculation that a certificate scheme could be built into the main NHS app.
The high cost of fertility treatment leads some to find donors on social media, even though it's risky and could be illegal.
Some women who've had the condition have been told to shield while others have not.
Since the first case in northern Italy a year ago the lives of Europeans have been changed forever.
Dr John Wright says he's often asked which vaccine is best, but the answer is it's too early to say.
Jordan Charles went months with undiagnosed diabetes after contracting Covid-19.
Some volunteers in the UK will be deliberately infected with coronavirus in a "challenge trial".
Deaths are falling faster for the over-80s - but does that mean the vaccine is working?
Coronavirus has had a big impact on our mental health, but have services been able to keep up?
More cases are being found in the UK, including a variant first seen in Brazil.
Two approved Covid vaccines are being rolled out across the UK. So when might you get one?
More people have been added to the clinically extremely vulnerable list in England. Why?
As the UK cautiously unlocks, experts will review the evidence on when and where masks are needed.
The prime minister has announced a plan for how the lockdown will be lifted in England.
Why experts are concerned about the emergence of this particular new version of coronavirus.
Explore the data on coronavirus in the UK and find out how many cases there are in your area.
What is it like to have the coronavirus, how will it affect you and how is it treated?
Some people across the UK have been able to form "support bubbles" or "extended households".
What are the tests for coronavirus, who are they for, and how do they work?
A new cough, fever and change in smell or taste are the key symptoms that mean you may have coronavirus.
Use our tool to check the meaning of key words and phrases associated with the Covid-19 outbreak.
While most people will have mild symptoms and recover quickly, some are more prone to getting sick.
With face masks in high demand, we look at whether they really can protect people from the virus.
A look at how schools are preparing to welcome back most pupils on 8 March.
Professor Jonathan Van-Tam says that for over 70s, both the Oxford-AstraZeneca and Pfizer vaccines are 60% effective against illness after the first dose.
Misleading claims about coronavirus vaccines have been spreading online.
Jim Ashworth-Beaumont needs the prosthetic after being involved in a cycling accident last year.
After phase one is complete by mid-April, here's the order in which all other adults will get the jab.