title: Biosecurity gaps likely   aided H5N2 spread.
mesh_terms: D000818:Animals; D002645:Chickens; D004196:Disease Outbreaks / Q000662:veterinary*; D053125:Influenza A Virus, H5N2 Subtype / Q000502:physiology*; D005585:Influenza in Birds / Q000453:epidemiology / Q000635:transmission / Q000821:virology*; D014422:Turkeys; D014481:United States / Q000453:epidemiology