This Decision lays down detailed rules: (a) to be applied in order to prevent the spread of avian influenza caused by highly pathogenic influenza A virus of subtype H5N1 from birds living in the wild to birds kept in zoos and approved bodies, institutes or centres; (b) for the vaccination of birds kept in zoos and approved bodies, institutes or centres. Member States are required to take appropriate and practicable measures to reduce the risk of transmission of H5N1 from birds living in the wild