This A/H5N1 group has shown itself to be unusually stable for an avian influenza strain and has spread among birds in two waves, the second of which took it out of south and south-east Asia to Europe and Africa through migratory birds and trade.
Ta skupina A/H5N1 se je izkazala kot nenavadno stabilna za sev aviarne influence in se je širila med pticami v dveh valovih, pri čemer se je drugi val s pticami selivkami in trgovino razširil iz južne in jugovzhodne Azije v Evropo in Afriko.