A case of bird flu has been detected on a duck farm in Hajdúnánás, Hungary, with the H5N1 subtype of the virus found in the dead animals. Authorities have implemented measures, including liquidating the stock, creating protective and surveillance zones, and conducting an epidemiological investigation, to prevent the spread of the disease. It is crucial for high-risk areas to keep poultry indoors and take precautions such as disinfecting vehicles and maintaining hygiene to protect animals from infection.