sign at the entrance of a farm in germany with the inscription attention avian influenza

achtung agriculture animal area attention avian barrier bird closed contagion danger disease domestic entrance epidemic epizootic farm farming flu geflügelpest germany h5n1 husbandry ill illness indicating infection infectious influenza info information inscription killing label locked measure outbreaks pandemic pathogen pest pet precautionary quarantine regard restricted risk safety security shut sign veterinarian veterinary virus warning wild zone