COVID-19 testing — why do false negatives happen? | Science| In-depth reporting on science and technology | DW | 07.01.2021
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COVID-19 testing — why do false negatives happen?

From the very beginning, testing for COVID-19 was one of the most essential - and challenging - aspects of controlling the spread of the disease. Even after the swab is taken and the results are in, they can't always be trusted. Why?

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