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Timing critical to antibody test accuracy, researchers find

June 25, 2020

University of Birmingham researchers have found that the accuracy of antibody tests for Covid-19 is highly dependent on timing.

By combining data from 54 studies, the researchers found that antibody tests are not accurate enough to confirm whether someone has had the Covid-19 virus if used in the first two weeks after symptoms appear.

The tests are only likely to be useful in detecting historic Covid-19 infection if used at least 14 days after symptom onset, and will still miss around one in ten cases.