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Number of virus detections in children diagnosed with pneumonia, considering single infections and coinfections, by conventional PCR and indirect immunofluorescence assay. HBoV = human bocavirus; RSV = respiratory syncytial virus; AdV = adenovirus; PIV1 = parainfluenza virus 1; PIV2 = parainfluenza virus 2; PIV3 = parainfluenza virus 3; PIV4 = parainfluenza virus 4; FLUA = influenza A; FLUB = influenza B
