Table 1 Comparison of VNT and PRNT assays for a panel of 142 samples
VNT | PRNT50 | PRNT90 | ||
|---|---|---|---|---|
Positive (titre ≥10) | Negative (titre < 10) | Positive (titre ≥10) | Negative (titre < 10) | |
Positive (titre ≥40) | 51 | 1 | 51 | 1 |
Negative (titre < 40) | 9 | 81 | 1 | 89 |
Sensitivity of VNT (95% CI) | 85% (51/60) (72.9–92.4%) | 98.8% (51/52) (88.4–99.9%) | ||
Specificity of VNT (95% CI) | 98.7% (81/82) (92.4–99.9%) | 98.8% (89/90) (93.1–99.9%) | ||