Double infections with R.S. virus and influenza.
D002675:Child, Preschool; D004196:Disease Outbreaks; D006801:Humans; D007251:Influenza, Human / Q000150:complications* / Q000453:epidemiology; D009976:Orthomyxoviridae Infections / Q000150:complications* / Q000453:epidemiology; D012136:Respiratory Syncytial Viruses; D012606:Scotland