Respiratory infections in children.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D004739:England / Q000453:epidemiology; D005260:Female; D006801:Humans; D015994:Incidence; D007223:Infant; D007251:Influenza, Human / Q000453:epidemiology*; D008297:Male; D011159:Population Surveillance; D012136:Respiratory Syncytial Viruses; D012141:Respiratory Tract Infections / Q000453:epidemiology*; D018108:Respirovirus; D012229:Rhinovirus; D014852:Wales / Q000453:epidemiology