Table 2.

Potential false-positive and false-negative rates after heat-inactivation for SARS-CoV-2 IgG and IgM Ab detection with indirect immunity-based kit produced by manufacturer A.

IgG Ab		56°C for 30 min		Total	56°C for 45 min		Total	56°C for 60 min		Total	60°C for 30 min		Total	65°C for 30 min		Total
		Po	Ne		Po	Ne		Po	Ne		Po	Ne		Po	Ne
Control	Po	125 (100.0%)	$0\; (0.0\%)$	125	125 (100.0%)	$0\; (0.0\%)$	125	125 (100.0%)	$0\; (0.0\%)$	125	124 (99.2%)	$1\; (0.8\%)$	125	121 (96.8%)	$4\; (3.2\%)$	125
	Ne	vitchu0 (0.0%)	4 (100.0%)	4	vitchu0 (0.0%)	4 (100%)	4	vitchu1 (25.0%)	3 (75.0%)	4	vitchu1 (25.0%)	3 (75.0%)	4	vitchu0 (0.0%)	4 (100.0%)	4
Total		125	4	129	125	4	129	126	3	129	125	4	129	121	8	129
IgM Ab		Po	Ne	Total	Po	Ne	Total	Po	Ne	Total	Po	Ne	Total	Po	Ne	Total
Control	Po	62 (83.8%)	$12\; (16.2\%)$	74	62 (84.0%)	$12\; (16.0\%)$	74	61 (82.4%)	$13\; (17.6\%)$	74	64 (86.5%)	$10\; (13.5\%)$	74	56 (75.7%)	$18\; (24.3\%)$	74
	Ne	$16\; (29.1\%)$	39 (70.9%)	55	$11\; (21.4\%)$	44 (78.6%)	55	$12\; (21.8\%)$	43 (78.2%)	55	$17\; (30.9\%)$	38 (69.1%)	55	$16\; (29.1\%)$	39 (70.9%)	55
Total		78	51	129	73	56	129	73	56	129	81	48	129	72	57	129

blue bold, false-negative; red bold, false-positive; Po, positive; Ne, negative.