The rapid antigen test approved in Switzerland has performed badly in a direct comparison with PCR tests. Among 141 people infected with Covid-19, it detected only two out of three infections.
The research team determined the diagnostic accuracy of Roche’s rapid antigen test in a clinical setting for the first time by evaluating samples taken by specially trained experts using both test methods.
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Rapid Covid-19 tests could offer a path back to normal
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Could rapid antigen tests like the one Roche plans to launch this month become the norm?
In the sample of 1,465 tests, the PCR test showed that 141 people (9.6%) were infected with Covid-19, while the rapid antigen test detected 95 infections (6.4%). In practice, it could be assumed that the results are even worse, especially when taking samples, the statement said.
“Widespread application in such a setting might lead to a considerable number of individuals falsely classified as SARS-CoV-2 negative,” the study concluded.
Missed cases
Co-author Franziska Suter-Riniker from the University of Bern added that antigen tests work better with a high viral load than with a low viral load. Thus, highly infectious people would also be more likely to test positive.
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Swiss Politics
Coronavirus: the situation in Switzerland
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An overview of the latest Covid-related information in the Alpine nation.
The researchers wrote that currently an estimated 130,000 rapid tests are carried out per week in Switzerland. With about 18% coming back positive, some 23,400 would be correctly identified as positive, but 12,400 infected people would be missed.
“There is thus a potential risk that antigen tests will make the pandemic worse instead of slowing it down,” said study leader Michael Nagler from the Insel hospital. “The rapid antigen tests available today should therefore only be used with reservations as part of the Covid-19 measures.”
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What’s the best way to convince people to get the Covid vaccine?
Do positive incentives like give-aways work? Or should more coercive measures like in France be taken?
Boats sail to Solothurn to celebrate 700 years of Le Landeron
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The challenge of crossing Lake Biel from Le Landeron to Solothurn without a motor was taken up by 16 amateur crews on Saturday. The competition is part of Le Landeron's 700th anniversary celebrations.
Swiss cantonal ministers keep low profile on social media
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A small base of followers and neutral posts: these are the conclusions that emerge from a study published by UNIL researchers into the use of social networks by councillors of state.
Swiss rents forecast to rise up to 5% annually, housing chief warns
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Rents on the Swiss market are set to rise by between 3% and 5% a year over the next few years, warned Martin Tschirren, Director of the Federal Housing Office (FHO), on Sunday. "Demand for housing remains higher than supply".
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The Council of the Swiss Abroad, meeting today in Bern, passed a resolution in favour of the new Electronic Identity Act (Id-e), which will be put to the vote on 28 September.
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‘You can’t test the virus away’
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As Switzerland embarks on a major test offensive, Geneva virologist Isabella Eckerle cautions against treating it as a silver bullet.
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