Negative Covid-19 antibody test. Rapid lateral flow test for SARS-CoV-2 antibodies showing a positive result both for Immunoglobulin G (IgG) and Immunoglobulin M (IgM). The dark pink line at upper right of the test is the control to confirm the test has been conducted correctly. The absence of lines nect to either the 'G' or the 'M' means that no IgG or IgM antibodies have been detected. SARS-CoV-2 is the causative agent of Covid-19. This lateral flow test produces a result in ten minutes.