TABLE 1.

Linearity assessment of the quantitative Roche SARS-CoV-2 S assay^a

Sample	Rep 1 (U/ml)	Rep 2 (U/ml)	Avg (U/ml)	Expected (U/ml)	Dilution factor	Difference (U/ml)	% difference
Linearity assessment 1
Neat high sample	1,102	1,092	1,097	1,097	N/Ab	N/A	N/A
1	1,021	1,030	1,026	987	1.11	38.2	3.87
2	917	932	925	878	1.25	47.2	5.38
3	767	780	773	768	1.43	5.40	0.70
4	691	705	698	658	1.67	39.8	6.04
5	568	569	568	549	2	19.7	3.59
6	407	415	411	439	2.5	−27.8	−6.32
7	319	321	320	329	3.33	−9.05	−2.75
8	218	229	224	219	5	4.40	2.01
9	126	129	127	110	10	17.7	16.1
10	24.7	25.1	24.9	27.4	40	−2.53	−9.21
11	18.2	18.6	18.4	11.0	100	7.44	67.8
12	9.18	9.45	9.32	5.49	200	3.83	69.8
Neat low sample	<0.40	<0.40	<0.40	<0.40	N/A	N/A	N/A

^aAll values are reported up to 3 significant figures.

^bN/A, not available.