The WANTAI SARS-CoV-2 IGRA is an enzyme-linked immunosorbent assay for quantitative detection of Interferon Gamma (IFN-?) that responds to in-vitro stimulation by spike protein of SARS-CoV-2 in human whole blood. It is intended for use as an aid in the diagnosis of specific T cellular immune response of SARS-CoV-2 spike protein after vaccination or infection. This kit cannot be used as the only basis for clinical diagnosis.