Only one line next to ‘C’ represents a negative reading, and one line next to ‘T’ flags the test is void because it has not been performed correctly. Two lines on the device next to the letters ‘C’ and ‘T’ indicate a positive result. Made in China by American firm Innova, the tests are simple to use: a person swabs their throat and nose, swishes the stick in liquid and pours two drops into a flat plastic reader. And the latter I think is hugely important because it empowers people to get an answer.” “One is to help control the disease, the other is to help people feel control in their lives. “The reason I’m such a fan of these tests is because there are two very, very compelling reasons for using them,” says Tim Peto, a professor of infectious diseases at the University of Oxford who last year evaluated dozens of lateral flow products hitting the market. Proponents concede the new devices produce false negatives or false positives but argue rapid testing is a much more pragmatic approach for those who do not have symptoms but want or need to be tested. But the so-called lateral flow tests are polarising because they are far less accurate than the gold-standard polymerase chain reaction (PCR) tests performed by professionals and sent to laboratories for analysis.
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