The COVID-19 IgG/IgM/IgA Total antibody ELISA Research Kit is a detection assay for SARS-CoV-2 antibodies. This high-throughput method is based on the use of SARS-CoV-2 nucleocapsid protein. The N -protein traps antibodies on the plate which allows high level detection. A mixture of detection antibodies towards human IgG, IgM and IgA of SARS-CoV-2 creates a colorimetric signal. The generated signal assesses the immune response to SARS-CoV-2 in samples from human origin.