Figure 4 |.

Associations between Viral Clade and Ct Value and Disease Severity. a) PCR Cycle threshold (Ct) values of patient samples grouped by major Clade assignment. b) Specimen Ct values by maximum disease severity. Mild (blue) = no hospital admission; Moderate (red) = hospital admission, but no ICU stay; Severe (green) = ICU admission. In both panels, horizontal lines in each box represent the median value and the lower and upper error bars are the interquartile ranges. Significance is indicated for the comparisons performed within each fitted model (* = q-value<0.05; ** = q-value <0.01).