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. 2022 Jan 3;9:780801. doi: 10.3389/fpubh.2021.780801

Figure 1.

Figure 1

Sensitivity evaluation of the rapid antigen test (RAT; SD BIOSENSOR, South Korea) at different ranges of Cq values for ancestral strain of SARS-CoV-2 positive samples diagnosed by RT-qPCR. SARS-CoV-2 detection by RAT from RT-qPCR positive samples with Cq value between 20 ≤ Cq <25, 25 ≤ Cq <30, 30 ≤ Cq <35, and Cq≥35, respectively. All samples were positive by RT-qPCR. Table shows: the RFU (relative fluorescence units) and Cq value for the viral ORF1ab probe (n = 10 samples per Cq range).