previously infected with COVID-19. The laboratory will use the Roche Diagnostics Elecsys Anti-SARS-CoV-2 antibody test due to its accuracy and reliability. This test will determine a correct result for the presence or absence of COVID-19 antibodies 99.81 percent of the time, meaning false positives are rare. It has proven 100 percent sensitive for the presence of antibodies 14 days or more after a confirmed infection.