negatives

Up to ONE-THIRD of all coronavirus antibody tests may come back as false negatives, study finds

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Up to ONE-THIRD of all coronavirus antibody tests may come back as false negatives, study finds Researchers looked at 40 studies analyzing coronavirus antibody tests, which determine if someone has previously been infected Sensitivity rates, meaning the rate at which tests come back positive, ranged from 66% to 97.8% This means between 2.2% and more than … Read more

Coronavirus tests return false negatives 67% of the time if they’re given four days after infection

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Coronavirus tests miss one in five infections – and the rate of false negatives TRIPLES if someone is tested too early Researchers looked at coronavirus test samples for 1,330 patients from across seven studies  One day after being infected, the false-negative rate was 100% and, four days later, it fell to about 67% On the … Read more