FIG 1.
COVID-19 Ag Respi-Strip (Coris) results according to real-time PCR CT values. All cycle threshold values of E gene real-time PCR-positive assays are shown for positive and negative COVID-19 Ag Respi-Strip assay results. Results gathering CT values for all real-time PCR-positive assays are depicted by squares. CT values between samples positive or negative for the antigenic assay are significantly different (* indicates a P value of <0.0001). CT values corresponding to the Cobas 6800, Allplex, Anatolia, and RealStar assays are depicted by triangles, diamonds, circles, and upside-down triangles, respectively.