Table 2.
Correlation between conventional- and surrogate virus neutralization test for SARS-CoV-2, using human sera.
| cVNT (Cut-Off: 50%) |
cVNT (Cut-Off: 80%) |
||||
|---|---|---|---|---|---|
| COVID-19 patients (n = 54) | Pos | Neg | Pos | Neg | |
| sVNT (Cut-off: 36%) |
Pos | 54 | 0 | 54 | 0 |
| Neg | 0 | 0 | 0 | 0 | |
| Blood donors (n = 18) | Pos | Neg | Pos | Neg | |
| sVNT (Cut-off: 36%) |
Pos | 0 | 0 | 0 | 0 |
| Neg | 0 | 18 | 0 | 18 | |
Pos—positive; neg—negative; sVNT—surrogate virus neutralization test; cVNT—conventional virus neutralization test. 80%/50%/36%—positivity cut-off. Sample dilution: 1:20.