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. 2023 Sep 5;15(9):1877. doi: 10.3390/v15091877

Figure 4.

Figure 4

Comparative diagnostic performance among the recombinant N, S and N4S11-SC2 proteins. ELISA assays with the N, S and N4S11-SC2 were conducted using the same urine and serum samples from COVID-19 patients with previously positive qRT-PCR above 8 days PSO (n = 72) and from healthy control subjects (n = 18). The mean of each group is shown and the gray band indicates indeterminate values for each sample, while index values below the range (<0.8) are negative and values above (>1.1) are considered positive.