Fig. 2

Clinical features of SARS-CoV-2 RNA-positive patients. a Kinetics of SARS-CoV-2 RNA clearance. The cumulative viral clearance (percentage, %) is shown for the negative retest (black circle) and positive retest groups (red square). p Values (log-rank (Mantel–Cox) test) are indicated. b Maximum viral concentration distribution. Each data point represents the maximum viral concentration (Ct value) in each patient during the entire admission. Patient numbers are labeled below each group. c Age distribution. An unpaired t test with Welch’s correction was used. p Values with a significant difference are shown. d Clinical symptom severity. Percentage (%) and number (n) are indicated