TABLE 2.

Characteristics of patients persistently positive for SARS-CoV-2 by rRT-PCR with positive virus isolation

Patient-sample	DASOa	N1/N2 (CT values)	Virus isolation result	rRT-PCR (N1) (CT value from cell culture)b	ELISA-IgG SPIKE (OD/cutoff)c	Neutralization (EC50)
P03-1302	7	18.7/28.6	Pos	16.7	0.42	<1:20
P03-2620	21	29.6/29.8	Neg	38.65	2.94	1:100
P03-4117	29	15.7/15.0	Pos	16.7	3.58	1:20
P03-5943	36	31.0/30.0	Pos	17.67	3.39	1:100
P03-7439	43	28.1/28.9	Pos	16.93	3.51	1:20
P03-17056	128	29.8/29.8	Pos	17.33	4.05	1:100
P03-17661	135	35.0/36.0	Neg	35.77	3.59	1:20
P06-2340	23	16.8/18.7	Pos	23.18	2.45	<1:20
P09-3094	14	23.1/23.7	Pos	18.47	2.14	1:20
P10-3663	14	31.1/30.6	Pos	14.3	2.90	<1:20
P10-4600	18	29.0/30.3	Pos	14.1	ND	ND
P11-3664	25	19.9/20.8	Pos	14.9	3.47	ND
P11-6995	40	38.8/38.6	Pos	28.85	3.65	<1:20
P18-5191	15	20.7/20.8	Pos	25.58	2.90	<1:20
P20-5912	2	15.7/16.2	Pos	19.84	ND	ND
P20-8255	14	34.9/35.1	Pos	15.78	2.72	<1:20
P30-8225	14	29.0/29.5	Pos	13.94	2.86	<1:20
P32-10311	22	28.1/28.9	Pos	14.72	3.02	<1:20
P32-11222	29	24.7/27	Pos	13.76	3.20	ND
P33-10406	19	29.2/30.0	Pos	16.89	2.87	<1:20
P33-11323	26	34.1/34.5	Pos	18.41	2.43	1:100
P34-10417	17	37.9/37.4	Pos	13.98	2.68	1:2,500
P39-11507	14	33.5/35.5	Pos	19.03	3.08	<1:20
P49-11787	8	15.5/15.3	Pos	14.87	0.68	<1:20
P49-13083	21	32.1/32.3	Pos	15.55	4.29	<1:20
P49-13867	28	35.3/36.9	Pos	14.22	3.86	1:2,500
P50-12606	14	23.9/22.2	Pos	14.59	1.19	ND

^aDASO, days after symptom onset.

^bRT-qPCR from cell supernatant after the second passage in culture.

^cResults of the inhouse ELISA assay are represented as optical density (OD)/assay cutoff. Bold text, positive values; underlined text, inconclusive values; ND, not determined.