Relation sampleĀ“s condition to infection
DAVIH BLOT-VIH-1/2   Positive Negative
Positive a b
Negative c d
Legend: a: True positives (TP); b: False positives (FP); c: False negatives (FN); d: True negatives (TN); Sensitivity=a/a+c; Specificity=d/b+d.
Table 2: To calculate the performance parameters of WB assay, results were processed according the following table.
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