Test name	Test name	Pre‐pandemic	Suspected of COVID‐19	Current RT‐PCR‐negative	Current untested	Other/mixed unclear	Cross‐reactivity/confounder panels
Test brand	Test brand	Specificity (95% CI)	Test groups (true negatives/non‐COVID cases)
ELISA
Beijing Wantai	Wantai ELISA Total‐Ab assay	8 (2009/2020)	1 (50/50)		1 (300/300)	1 (97/100)	2 (130/130)
		99.5 (99.0, 99.7)	100a (92.9, 100)**		100a (98.8, 100)**	97.0a (91.5, 99.4)*	100a (97.2, 100)**
Bio‐Rad Laboratories	Novel coronavirus COVID‐19 Total‐Ab assay						1 (28/28)
							100a (87.7, 100)**
CLIA
Ortho Clinical	Vitros (VITROS) Anti‐SARS‐Cov‐2 Total assay Total‐Ab	2 (995/997)		1 (57/57)			2 (168/169)
		99.8 (98.5, 100)		100a (93.7, 100)**			99.4 (95.9, 99.9)
Roche Diagnostics	Elecsys anti‐SARS‐CoV‐2 antibody assay	25 (5569/5579)	3 (331/336)	4 (307/307)	2 (1029/1029)	1 (26/26) 2 (99/99)	13 (836/839)
		99.8 (99.7, 99.9)	98.5 (96.5, 99.4)	100a (98.8, 100)**	100a (99.6, 100)**	100a (96.3, 100)**	99.8 (97.6, 100)
Siemens Healthcare	Siemens Atellica Total‐Ab assay	6 (2435/2439)					3 (210/210)
		99.9 (99.3, 100)					100a (98.3, 100)**
Siemens Healthcare	Siemens Vista Total‐Ab assay	1 (596/596)					1 (35/35)
		100a (99.4, 100)**					100a (90.0, 100)**
Watmind Medical	SARS‐CoV‐2 Ab Diagnostic Test Kit	1 (41/50)
		82.0a (68.6, 91.4)*
Xiamen Wantai	Total Ab CMIA		1 (231/234)
			98.7a (96.3, 99.7)*
Xiamen InnoDx	Novel coronavirus (2019‐nCoV) antibody test kit Total‐Ab	1 (267/270)
		98.9a (96.8, 99.8)*
Other/unclear
Luminex	SARS‐CoV‐2 MIA Total Ab	1 (254/256)
		99.2a (97.2, 99.9)*
Vibrant America	Vibrant COVID‐19 Ab Total‐Ab					1 (5250/5262)
						99.8a (99.6, 99.9)*
aEstimates and confidence intervals by summing the counts of true negative and false positive across 2 x 2 tables *95% exact binomial confidence interval **97.5% one‐sided exact binomial confidence interval Ab: antibodyCI: confidence intervalsCLIA: chemiluminescence immunoassayELISA: enzyme‐linked immunosorbent assay MIA: magnetic immunoassay RT‐PCR: reverse transcription polymerase chain reaction