SARS-CoV-2 Neutralizing Antibody Rapid Test Kit (Serum/plasma/Whole blood) is a novel qualitative detection of coronavirus neutralizing antibodies in human serum, plasma and whole blood by side-flow chromatography immunoassay, which is suitable for the auxiliary diagnosis of SARS-COV-2 neutralizing antibodies after vaccination. Robust serological testing to detect neutralizing antibodies to SARS-CoV-2 is urgently needed not only to determine infection rates, herd immunity and predict humoral protection, but also vaccine efficacy during clinical trials and after mass vaccination. The SARS CoV-2 Neutralizing Antibody Rapid Test Kit (Colloidal gold) is a side-flow chromatography immunoassay for semi-qualitative detection of neutralizing antibodies after vaccination or infection with SARS-CoV-2 virus. In human serum, plasma and whole blood. Sars-cov II antibodies are protective antibodies produced by the body after vaccination, or infection with the Severe acute respiratory syndrome coronavirus virus. Not all antibodies produced by the body are neutralizing antibodies. Only antibodies that have a protective function can be named neutralizing antibodies.