The FaStep COVID-19 IgG/IgM (Whole Blood/Serum/Plasma) Rapid Test is a rapid lateral flow chromatography immunoassay intended for the qualitative detection and differentiation of IgM and IgG antibodies to SARS-CoV-2 in human venous whole blood . plasma from anticoagulated blood or serum. The FaStep COVID-19 IgG/IgM Rapid Test is intended for use as an aid in identifying individuals with an adaptive immune response to SARS-CoV-2 . indicating recent or prior infection.