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. 2021 Nov 17;198:113810. doi: 10.1016/j.bios.2021.113810

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Fig. 6 — (a) Fluorescence images and corresponding intensities of SQS-LFIA for the 11 mismatched cases by GLFIA against RT-PCR. (b) Box-diagram for the quantitative detection of SARS-CoV-2 antibody in 397 clinical samples by SQS-LFIA. The medians (midlines), the third/first quartiles (upper and lower lines) and the sample numbers (N) of each group are labeled in the diagram. The inset shows an enlarged box-diagram with low fluorescence intensity range (lower than 45). (c) ROC analysis to assess the detection capability of SQS-LFIA. (d) Fluorescence images and corresponding intensities of SQS-LFIA for Flu A, Flu B, CMV, EB and NV antibodies positive serum samples (tested by ELISA kits with signal/cutoff ratios of 5.5, 7.2, 15.0, 9.6 and 7.7, respectively, and signal/cutoff >1.0 means positive result).