Parameter DFA RT-PCR True positive 44 48 False positive 0 0 True negative 252 252 False negative 4 0 Total number 300 300 Sensitivity 91.7% 100% Specificity 100% 100% Positive predictive value 100% 100% Negative predictive value 98.4% 100%

Table 5: Sensitivity, specificity, and predictive values for the detection of hMPV in respiratory specimens.