The ability to identify people with antibodies to SARS-CoV-2 is known as sensitivity. It is also known as the true positive rate. A highly sensitive test will identify those people who truly have antibodies. This means that there will be few people with false-negative results.
The ability of the test to correctly identify people who have no antibodies to SARS-CoV-2 is known as specificity. This is the true negative rate. A highly specific test will identify people who truly have no antibodies. This test will identify very few people who have no antibodies .