Division 2 ‘highly pathogenic avian influenza (HPAI)’ means an infection of poultry or other captive birds caused by:

avian influenza viruses of the subtypes H5 or H7 with genome sequences codifying for multiple basic amino acids at the cleavage site of the haemagglutinin molecule similar to that observed for other HPAI viruses, indicating that the haemagglutinin molecule can be cleaved by a host ubiquitous protease; or

X1avian influenza viruses with an intravenous pathogenicity index in six-week old chickens greater than 1.2;