The detection rate of antibodies is very high. Antibodies are the product of the human body’s stress response. It is evenly distributed in human blood and does not exist sampling error, obtaining a very big advantage over nucleic acid. At the same time, the antibody detection time is very short and the blood volume is relatively small. IgM and IgA antibodies can more accurately diagnose the disease. We provide high performance COVID-19 S protein IgG antibody, N protein IgG antibody and S protein IgM antibody detection kits (Magnetic Particle Chemiluminescence, CLIA).