The principle of Artron COVID-19 IgM/IgG Antibody Test is an antibody-capture immunochromatographic assay for the simultaneous detection and differentiation of IgM & IgG antibodies to SARS-CoV-2 virus in human serum, plasma, or whole blood samples. SARS-COV- 2-specific antigens are conjugated to colloidal gold and deposited on the conjugate pad. Monoclonal anti-human IgM and monoclonal anti-human IgG are immobilized on two individual test lines (M line and G line) of the nitrocellulose membrane. The M line is closer to the sample well and is followed by the G line. When the sample is loaded, the gold-antigen conjugate is rehydrated and the SARS-COV-21gM and/or IgG antibodies, if any in the sample, will interact with the gold conjugated antigen. The immunocomplex will migrate towards the test window reaching the test zone (G line & M line) where they will be captured by the relevant anti-human IgM (M line) and/or anti-human IgG (G line), forming a visible pink line, indicating positive results. If SARS- COV-2 antibodies are absent in the sample, no pink line will appear in the test lines (G line & M line), indicating a negative result.