title: A study on influenza virus and associated bacterial pathogens in upper and lower respiratory tract infections in children.
mesh_terms: D001419:Bacteria / Q000302:isolation & purification; D001991:Bronchitis / Q000209:etiology; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D009304:Nasopharyngitis / Q000209:etiology; D009975:Orthomyxoviridae / Q000302:isolation & purification*; D011014:Pneumonia / Q000209:etiology; D012141:Respiratory Tract Infections / Q000209:etiology / Q000382:microbiology*