Superdrug has become the first high street retailer to sell a coronavirus antibody test to the public for £69 with almost 100 per cent accuracy.
The test is produced by medical giant Abbott, which was the second antibody test approved by ministers this month after that made by Roche.
Blood samples have to be posted to a laboratory where results are turned around in 24 hours.
Therefore it isn’t the ‘DIY’ home testing kit Britons have long pined for where results are almost instant.
Ministers have promised ‘pregnancy-test’ style kits since March but none have been approved yet.
Antibodies are a sign someone has already fought the killer infection. But scientists are still unsure whether this means they are protected from catching the virus again.
Therefore, some say there is ‘no point’ spending money on a test like Superdrug’s because it is still not clear what the results mean.
For this reason, Superdrug said individuals will need to continue social distancing and following Government guidance even if their result is positive.
Superdrug has become the first high street retailer to sell a coronavirus antibody test to the public for £69 with almost 100 per cent accuracy
The test is produced by medical giant Abbott and has been given the seal of approval by Public Health England
Superdrug started selling the kit this morning on its Online Doctor service for £69, but said it isn’t available in store.
It requires a few drops of blood collected by a finger prick taken at home which are sent off in a pre-paid envelope to The Doctors Laboratory.
Michael Henry, Superdrug’s Healthcare Director, said he is ‘confident’ the test is accurate and reliable.
It was the second antibody test to be ratified as accurate by Public Health England. The first was that manufactured by Swiss firm Roche, called Elecsys, which is also not designed to give people a result in the comfort of their own home.
Ministers are in talks with Roche to buy millions of the tests, which will be given to NHS and social care workers for free. It is not clear if they will ever be given to the public.
WHAT ANTIBODY TESTS ARE APPROVED SO FAR?
Antibody tests made by Abbott and Roche are the first antibody tests to be ratified as accurate by Public Health England, after weeks of disappointments.
The tests detect whether someone has had the virus and then recovered – which could indicate they may be immune.
PHE said the ratification of the two tests performed in its labs was a ‘very positive development’.
Both are likely to be used in the ‘test, track and trace’ programme being launched next week, in which anyone who has been in contact with a coronavirus patient will be tested.
The Department of Health is in conversations with both firms about incorporating the kits into its testing programme, with NHS staff likely to be first to get access.
The Abbott test is also being sold privately for home use by health tech firm Babylon and retailer Superdrug for £69.
Home use of the test – which uses a spot of blood from a finger prick rather than a full blood sample – has only been confirmed as accurate by an independent lab, and not yet by PHE.
Scientists have stressed that although the two tests offer useful information about who has been infected, it is not yet clear what proportion of these people will be immune to the disease.
The idea of ‘immunity certificates’ has been shelved for now because of this, although No 10 said it was still exploring it.
Hopes have run high since March that antibody tests could allow employees to return to work.
Health Secretary Matt Hancock ordered 3.5million tests but it turned out the best of them could spot only 70 per cent of those who had been infected.
The new tests resolve that problem by using proven lab-based technology, rather than the ‘pregnancy-test’ style kits Mr Hancock had pinned his hopes on. They also generate very few ‘false positives’ – which means indicating someone has been infected when they have not.
Abbott’s antibody kits are on standby for NHS use and a spokesperson said last week the firm had capacity to provide five million tests a month to the UK ‘with immediate effect’.
But anyone over the age of 18 can now privately buy the Abbott test on Superdrug, so long as they do not currently have symptoms of the virus because it takes at least 14 days for antibodies to be made.
Babylon is selling it for the same price, while another Northampton-based company – checkmybodyhealth.co.uk – is offering the Abbott test for £89. London-based privatecoronavirustests.com is selling it for £99.
The test is 97.5 per cent sensitive, which means just over 97 people in 100 who test positive have indeed been infected.
The other three people, however, would get an inaccurate result – known as a false negative result. They will be told they do not have antibodies when in fact they do.
The test has 100 per cent specificity, which means it will never generate a ‘false positive’ result – when people are incorrectly led to believe they have antibodies.
Experts say is it better to compromise on sensitivity than specificity, because ‘false negatives’ can have dangerous consequences.
However, commenting on the test, Stephen Evans, a professor of pharmacoepidemiology, London School of Hygiene & Tropical Medicine, said: ‘This seems rather a strong claim since to be absolutely sure (“never”), an infinite number of people will have to have been tested.’
Will Irving, a professor of Virology, University of Nottingham, said although it is reassuring claims test to be very accurate, it depends entirely on how the company came to that conclusion.
He said: ‘The sensitivity data will be dependent on what kind of serum samples have been tested. If these are mostly – or all – from hospitalised patients, then the figure may be an overestimate, as there are data suggesting that individuals who don’t become very ill with COVID-19 may not make very high levels of antibody.
‘The same is true of specificity.’
PHE has not disclosed how many samples its evaluations were based on before giving Abbott (or Roche) the green light.
Superdrug doctor ambassador, Dr Zoe Williams, made clear the new test does not confirm someone is safe to go back to work or mingle in society.
She said: ‘There are however things to consider before taking it.
‘Receiving a positive antibody test result does not confer immunity, and it is important that people understand a positive test result does not mean you can be any more relaxed with the required hygiene and social distancing measures as set out by the government.’
Ministers are in talks with Roche to buy millions of the tests, which will be given to NHS and social care workers for free. The Roche test, called Elecsys (pictured), is also not designed to give people a result in the comfort of their own home.
Medical giant Abbott has produced a test which is essentially the same as the antibody test announced by the Government last week, manufactured by Swiss firm Roche.
Scientists welcomed the development in antibody testing. But rallied to remind the public that various antibody tests being sold privately online are a gamble, even if approved by officials.
WHY IS ANTIBODY TESTING IMPORTANT?
WHAT IS AN ANTIBODY TEST?
Unlike tests to diagnose diseases, antibody tests show who has been infected and recovered.
The body makes antibodies in response to many illnesses and infections, including other coronaviruses. New blood tests are being developed to identify antibodies unique to SARS-CoV-2, the official name of the new coronavirus.
The tests look for two kinds of antibodies: immunoglobulin M (IgM) and G (IgG). The body quickly produces IgM antibodies for its initial attack against infections. It makes IgG antibodies more slowly and retains them longer; IgG antibodies suggest possible immunity.
WHAT IS THE DIFFERENCE BETWEEN RAPID TESTS AND ASSAYS?
Some companies are developing finger-prick tests that get results in minutes. These are called immunoassays and will form the basis of home testing kits.
Others are developing far more accurate tests called enzyme-linked immunosorbent assays (ELISA) that require sending blood samples to a lab for analysis.
HOW CAN ANTIBODY TESTS HELP END LOCKDOWNS?
Antibody tests can help calculate what portion of the population has already been infected, as well as whether infections were mild or severe.
Governments and companies could use antibody tests to determine who would most likely be safe to return to work and public interactions, and whether it is safe to lift stay-at-home orders all at once in some regions or in stages based on infection risk.
People with negative antibody tests or very low antibody levels would likely have higher risk of infection than people with high antibody levels.
DO ANTIBODIES TO THE NEW CORONAVIRUS CONFER IMMUNITY?
While antibodies to many infectious diseases typically confer some level of immunity, whether that is the case with this unique coronavirus is not yet known.
And how strong immunity might be, or how long it might last in people previously infected, is not clear. With some diseases like measles the immunity can be lifelong. With others, immunity can wane over time.
Scientists cannot know with certainty that reinfection is not possible until further research.
Antibody tests could inform not just lockdown exits, but the best approach to treatments and vaccines.
Professor Gino Martini, Royal Pharmaceutical Society Chief Scientific Officer, said: ‘Any antibody test at present can only provide a partial picture.
‘The real issue is that no-one knows the level of immunity that is conferred by having antibodies to coronavirus, how long it might last, and if you can become re-infected.
‘We need much more information and data on immunity before we can understand the importance of having antibodies to the virus.’
Adam Finn, a professor of paediatrics, University of Bristol, said: ‘Even a true positive result, showing real antibody response to SARS-CoV-2, may not mean that a person is completely immune to the infection and at no risk of re-infection and of infecting others.
‘We hope that immunity following previous infection will be fully protective in this way, but we are not yet sure.
‘All of this complicated information is important.’
Professor Finn, who is also in the field of developing an antibody test for COVID-19, said until the science is clear, there is no point spending money on an antibody test.
‘Until we know how strong and long lasting immunity is after infection, it is hard to know what to do about the results of these tests, even if the tests are reliable,’ he said.
‘So the bottom line is: don’t spend money and time on any test unless you have a very clear idea of what the result does or does not mean for you and what you are going to do or not do if you get a positive or negative result.
‘If the answer is that the result is not going to change what you do because you can’t be sure what it means, then there’s no point in doing the test.’
Babylon’s Dr Olivia Morrow – who is helping to lead the company’s coronavirus testing effort – says an antibody test ‘can help give answers to people who are unsettled, wondering if that cough, fever, or loss of smell they had in February was COVID-19’.
Users can also choose to opt-in to share information to aid national research by institutions such as PHE, according to the company. It’s not clear if this is the case for Superdrug.
PHE have called the tests from Abbott and Roche ‘game changing’.
have been looking for an immunoassay test, which is a finger-prick tests that generates results in minutes at home, since ministers promised one back in March.
The results are displayed like a pregnancy stick and don’t need the help of a laboratory of doctor.
Such a test was touted as the key to lifting lockdowns because it would mean people could buy a test quickly online, find out if they have had the virus and return to work or not.
But progress has been halted because scientists have warned it’s still to early for them to know what the antibodies show, exactly.
PHE also have an extremely high threshold for accuracy of the test. There are hundreds of companies designing these tests, but so far, none tested by an Oxford University team have passed stringent protocol.