Positive Covid-19 antibody test. Rapid lateral flow test for SARS-CoV-2 antibodies showing a positive result for Immunoglobulin G (IgG). The dark pink line at upper right of the test is the control to confirm the test has been conducted correctly. The pale pink line next to the 'G' indicates the presence of IgG. This suggests that the patient has a long-term immune response to the SARS-CoV-2 virus, the causative agent of COVID-19. This may be from either a previous infection or vaccination, or both. This lateral flow test produces a result in ten minutes.