Table 1.

Recovery results for the assay of SARS-CoV-2 RdRp in pharyngeal swabs.

Sample number	Added	Found	Recovery (%)	RSD (%, n = 3)
1	50 aM	49.63 aM	99.26	1.29
2	100 aM	99.85 aM	99.85	3.50
3	1 fM	1.07 fM	107.0	2.07
4	10 fM	10.07 fM	100.7	1.65
5	100 fM	102.86 fM	102.86	4.68
6	1 pM	0.98 pM	98.00	4.49
7	10 pM	10.19 pM	101.90	2.70