Table 1.
Description of Evaluation Samples for the Assays
| Group | Euro S1- IgA | Euro S1-IgG | Euro NCP-IgG | GenScript sVNT | Wantai IgM | Wantai Total Ab |
|---|---|---|---|---|---|---|
| Panel A | Panel B | |||||
| Sensitivity | ||||||
| Infected (RT-PCR positive) | ||||||
| <7 d | 41 | 41 | 40 | 41 | 13 | 13 |
| 7–14 d | 34 | 34 | 34 | 34 | 17 | 17 |
| >14 d | 72 | 72 | 72 | 72 | 66 | 66 |
| Total | 147 | 147 | 146 | 147 | 96 | 96 |
| Specificity | ||||||
| Population | 179 | 179 | 191 | 312 | 100 | 209 |
| Cross-reactive | 30 | 30 | 30 | 30 | 30 | 36 |
| Total | 209 | 209 | 221 | 342 | 130 | 245 |
| Overall total samples | 356 | 356 | 367 | 489 | 226 | 341 |
| Individuals | 330 | 330 | 342 | 463 | 224 | 339 |
Samples tested by Euro S1-IgA, Euro S1-IgG, Euro NCP-IgG, and GenScript sVNT referred to as panel A. Samples tested by Wantai IgM and Wantai Total Ab referred to as panel B.
Abbreviations: Ab, antibody; Euro, Euroimmun; Ig, immunoglobulin; NCP, nucleocapsid; RT-PCR, reverse transcription polymerase chain reaction; sVNT, surrogate virus neutralization test.