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Diagnostic performance of the different assays. (A) ROC curve (samples used to calculate sensitivity and specificity, n = 346). (B) Dynamic trend to seropositivity in 222 samples from 106 patients with COVID-19. Of note, the average time to seroconversion lags behind the true time of seroconversion by a couple of days since patients were not tested daily and a patient is only considered to have seroconverted after the first positive result.
