The following article will describe you with the sensitivity and specificity of four real-time PCR assays. They were 
evaluated for detection and diagnostic use of H1N1 influenza A virus. Accordingly, the results of this evaluation study demonstrate that the concurrent use of primary diagnostic and confirmatory assays provides rapid and accurate assessment of confirmed cases, and allows appropriate management of patients.
Four real-time PCR assays described in this article were Health Protection Agency HPA (H1)v assay, The Centers for Disease Control and Prevention (CDC) realtime RT-PCR kit – CDC (H1)v assay, HPA (N1)v assay, and The swine-origin influenza virus (S-OIV) assay. The respiratory swab samples were tested according to the protocol provided for each assay.
You will see tables contain End-point detection of A/England/195/2009 (H1N1)v by four real-time PCR assays, Specificity of four real-time PCR assays with representative influenza A subtype virus isolates, and Comparison of all four assays on sequence confirmed swine-lineage samples.
Find the result of the evaluation study about The Sensitivity and Specificity of Real-Time PCR Assays here (source: eurosurveillance.org)
