The FDA worked with a number of agencies in efforts to evaluate the sensitivity and specificity of various COVID-19 serology tests.
Test sensitivity is the ability of a test to correctly identify those with the disease (true positive rate), whereas test specificity is the ability of the test to correctly identify those without the disease (true negative rate).
See the report here:
https://www.accessdata.fda.gov/cdrh_docs/presentations/maf/maf3247-a001.pdf