. 2020 Dec 5;27(3):473.e1–473.e4. doi: 10.1016/j.cmi.2020.11.033

Table 2.

Results of the confirmatory neutralization assay in relation to both screening assays. Samples that tested negative in screening assays were included since they belong to serum pairs (see Methods)

Results of pretesting			Results of confirmation
ELISA	CLIA	Number of samples	NT	Number of samples	Minimum titre	Maximum titre
Negative	Negative	23	Negative	22
Negative	Negative	23	Positive	1^a	1:16	1:16
Equivocal	Negative	33	Negative	28
Equivocal	Negative	33	Positive	5	1:16	1:16
Positive	Negative	26	Negative	23
Positive	Negative	26	Positive	3	1:16	1:16
Negative	Positive	5	Negative	3
Negative	Positive	5	Positive	2	1:64	1:64
Positive	Positive	33	Negative	0
Positive	Positive	33	Positive	33	1:64	1:≥ 1024

This sample was the first of a pair with an identical neutralization assay titre in the second sample and a conversion from negative to equivocal in ELISA, whereas in chemiluminescent immunoassay (CLIA) both samples tested negative.