Days after symptom onset
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Ct value (Mean ± SEM)
Upper airway swab (RdRP gene) Upper airway swab (RdRP gene)
Upper airway swab (E gene)
Upper airway swab (E gene)
Sputum specimen (RdRP gene) Sputum specimen (RdRP gene) Sputum specimen (E gene) Sputum specimen (E gene)
Mean SEM Mean SEM Mean SEM Mean SEM
0† 22.20 4.00 21.28 3.88 22.46 6.02 23.33 7.18
3 21.49 1.91 21.19 1.94 19.76 1.60 18.88 1.01
6 31.16 3.02 32.11 3.26 29.07 3.92 32.30 4.79
9 32.83 2.25 32.46 2.24 33.86 2.72 29.86 3.30
12 35.25 0.98 34.17 1.16 35.55 1.79 34.86 2.04
15 37.62 1.06 37.73 1.22 36.72 2.22 37.20 1.96
18 34.00 1.68 33.32 1.75 38.79 1.21 37.71 1.58
21 38.64 1.37 38.72 1.29 37.18 2.82 36.62 3.39
24 36.22 NA 36.50 NA 35.637 4.33 33.28 NA
27 35.80 0.45 36.25 0.17 40.00 NA 40.00 0.00
30 40.00 NA 40.00 NA 40.00 NA 40.00 NA