Experts analyzed over 5,000 test results in people who had both antigen and PCR tests performed.
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The study shows that only 42.6 percent of those infected show a positive antigen test. However, the tests were able to reveal a correctly negative result in 98.68 percent of cases.
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Although antigenic tests usually reliably detected infection in people with a high viral load, samples with a low viral load often showed a false negative result.
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According to the study leader Manuel Krone, this fact is problematic especially in the early stage of the disease, when the person does not yet have a high level of viral load, but is already infectious.
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