The US Food and Drug Administration issued emergency-use authorizations Wednesday for two new coronavirus antibody tests.
The tests can detect past infections after people have recovered. But it's still not clear whether having antibodies means a person has long-term immunity to the virus.
A total of three tests are now authorized by the FDA, which determined that the benefits of using the quickly designed tests during the pandemic outweigh the risks -- such as false negatives or false positives.
