Fig. 4. Antigen response for S1(3×), S2 (3×) and N response for RNA(–) and RNA(+) patients in the cohort. The RNA(–) shows outliers in all three antigen distributions and the cut-off is set at the highest value in the distribution (line). The RNA(+) patient group has varying intervals from onset of symptoms with varying rates of recovery. There is a set of patients who have not yet responded or not going to respond (below the cut-off line) that correspond to the early-time patients below 10 days shown in Fig. 1. These are excluded in the recovering +10 days cohort. The biobank data set is included for the specificity analysis.