Antibodies are developed by the body in response to an infection or after vaccination. SARS-CoV-2 is the virus that causes COVID-19. SARS-CoV-2 antibody tests detect antibodies to the SARS-CoV-2 virus. SARS-CoV-2 antibody tests can help identify people who may have been infected with the SARS-CoV-2 virus or have recovered from COVID-19. Antibody tests should not be used to tell you if you have an active COVID-19 infection.