SOFTEC COVID-19 IGG/IGM Antibody Test Kit (Single Pack) The COVID-19 IgG/IgM Rapid Test Cassette is a lateral flow chromatograpic immunoassay for the qualitative defection of antibodies (IgG and IgM) to Novel coronavirus in human Whole Blood/Serum/Plasma. It provides an aid in the diagnosis of intection with Novel coronavirus.