Table 4. Confirmed cases of positive for the antibody against SARS-CoV-2 among HCWs other than diagnosed COVID-19.
| Age/sex | Roche Elecsys Anti-SARS-CoV-2 assay | SG Medical R-FIND COVID-19 IgG/M/A ELISA | Abbott Anti-SARS-CoV-2 IgG assay | GenScript cPass SARS-CoV-2 Neutralization Antibody assay | Profession | COVID-19 diagnosis and quarantine experience | Scope of work | Suspected contact with a COVID-19 patient outside the workplace | COVID-19–related symptoms that require treatment | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Index | Result | OD | Index | Result | Index | Result | Neutralization rate (%) | Result | ||||||
| 58/F | 0.07 | − | 0.450 | 1.34 | + | 2.61 | + | 13.5 | − | Clerical position | PCR not tested/no quarantine | No contact of patients and samples | No | No |
| 52/M | 0.07 | − | 1.283 | 3.81 | + | 6.52 | + | 12.6 | − | Medical technician | PCR not tested/no quarantine | Contact with non-COVID-19 patients | No | No |
| 29/F | 2.95 | + | 0.167 | 0.47 | − | 0.16 | − | 31.6 | + | Clerical position | PCR not tested/no quarantine | Contact with non-COVID-19 patients | No | No |
| 51/F | 94.5 | + | 0.733 | 2.04 | + | 2.38 | + | 25.8 | + | Clerical position | PCR (−)/quarantine | Contact with COVID-19 patients | No | No |
| 27/F | 0.07 | − | 0.586 | 1.69 | + | 3.18 | + | −7.6 | − | Nurse | PCR (−)/quarantine | Contact with COVID-19 patients | No | No |
HCW = healthcare worker, COVID-19 = coronavirus disease 2019, SARS-CoV-2 = severe acute respiratory syndrome coronavirus-2, ELISA = enzyme-linked immunosorbent assay, PCR = polymerase chain reaction, OD = optical density.