Characteristics of Three Different Chemiluminescence Assays for Testing for SARS-CoV-2 Antibodies

Figure 3

Negative predictive values (NPVs) of SARS-CoV-2 antibody titers at three different cut-offs (manufacturers’ cut-offs and half and double the manufacturers’ cut-offs) over the whole range of possible pretest probabilities. Three different chemiluminescence assays were assessed: (a) CMIA, (b) LIA, and (c) ECLIA.

(a)

(b)

(c)