title: Avian influenza: no clear indication of how H5N8 virus entered the EU.
mesh_terms: D000818:Animals; D004196:Disease Outbreaks / Q000662:veterinary*; D005062:European Union; D059022:Food Safety; D005858:Germany / Q000453:epidemiology; D005585:Influenza in Birds / Q000453:epidemiology* / Q000821:virology*; D009426:Netherlands / Q000453:epidemiology; D011200:Poultry; D006113:United Kingdom / Q000453:epidemiology