title: Bird flu: crossing borders.
authors: Declan
authors: D
authors: Butler
mesh_terms: D025041:Animal Migration; D000818:Animals; D001208:Asia / Q000453:epidemiology; D001715:Bird Diseases / Q000453:epidemiology* / Q000517:prevention & control / Q000635:transmission / Q000821:virology*; D001717:Birds / Q000502:physiology / Q000821:virology*; D002648:Child; D003140:Communicable Disease Control / Q000639:trends; D004196:Disease Outbreaks / Q000517:prevention & control / Q000706:statistics & numerical data* / Q000662:veterinary; D005260:Female; D006801:Humans; D007223:Infant; D007251:Influenza, Human / Q000453:epidemiology* / Q000635:transmission / Q000662:veterinary* / Q000821:virology; D009975:Orthomyxoviridae / Q000235:genetics / Q000302:isolation & purification* / Q000472:pathogenicity; D013552:Swine / Q000821:virology