abc-19 rapid antibody test abc-19 rapid antibody test the abc-19 rapid antibody test is an immunological test for covid-19 exposure developed by the uk rapid test consortium and manufactured by abingdon health. it uses a lateral flow test to determine whether a person has igg antibodies to the sars-cov-2 virus that causes covid-19. the test uses a single drop of blood obtained from a finger prick and yields results in 20 minutes. the sensitivity of this test is 98.03% while the specificity is 99.56%. this test is paired with an easy-to-use mobile app which allows a trained professional to generate an antibody test certificate for storing on a person's smartphone.