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Relationship between subgenomic RNA load in the throat and serum antibody against SARS-CoV-2 N, RBD, and S protein (n = 18). Duration of illness was mapped on the color bar. Spearman's rank correlation test was used to determine the correlation between subgenomic RNA loads and antibody titer. The P value resulted from Spearman's rank correlation test were shown in each subplot.
