Table 1 Performance comparison between a flow cytometry-based S immunoassay and two commercially-available SARS-CoV-2 chemiluminescent immunoassays.

From: Performance of a flow cytometry-based immunoassay for detection of antibodies binding to SARS-CoV-2 spike protein

Assays under comparison (no. of specimens)

Flow cytometry SARS-CoV-2 S assay result (IgG/IgA/IgG + IgA)

Liaison® SARS-CoV-2 TrimericS IgG assay

Positive

Negative

Positive

Negative

Positive by Roche Elecsys® Anti-SARS-CoV-2 S (175)

168/170/172

7/5/3

151

17

Negative by Roche Elecsys® Anti-SARS-CoV-2 S (42)

4/7/7

38/35/35

1

41

Positive by Liaison® SARS-CoV-2 TrimericS IgG assay (154)

150/152/153

4/2/1

Negative by Liaison® SARS-CoV-2 TrimericS IgG assay (61)

20/23/24

41/38/37

  1. RBD receptor binding domain, S spike protein.