The Human SARS-CoV-2 N/S1 IgG Antibody ELISA Kit is designed for the qualitative detection of SARS-CoV-2 nucleocapsid (N) and spike (S1) protein-specific IgG antibodies in human serum or plasma samples This ELISA kit detects SARS-CoV-2 N/S1 Ab (IgG) using an indirect assay format which involves a two-step incubation process to ensure high specificity and sensitivity The procedure can be completed within 1-5 hours requiring a sample volume of 50-100 l per test Results are measured spectrophotometrically at 450 nm providing a reliable method to assess immune responses post-infection or vaccination Ideal for clinical research or diagnostic applications this kit offers a standardized and efficient solution for evaluating IgG antibody levels against SARS-CoV-2 aiding in the understanding of immune status and potential protection against the virus