US CDC that antibody tests for Covid-19 may be wrong up to half of the time.
The CDC now warns antibody testing is not accurate enough for it to be used for any policy-making decisions, as even with high test specificity, ‘less than half of those testing positive will truly have antibodies’.
There is currently a high level of inaccuracy in the testing, however, caused by how uncommon the virus is within the population.
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