title: Pigs ears and the law of unintended consequences.
authors.forename: D
authors.initials: D
authors.lastname: Magnus
authors.forename: J
authors.initials: J
authors.lastname: Campbell
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D006801:Humans; D007223:Infant; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000453:epidemiology*