In the present. The virus strains circulating among 2.1 subclade poultry and cause infections in humans in Indonesia, while the virus strain has infected 2.2 subclade in birds and humans in Africa, Asia and Europe strain virus 2.3 subclade found in poultry in China and neighboring countries in Southeast Asia, it is known whether it is the differences that exist between the virus strain H5N1 (clade, or subclade) at risk of birds to people, the virus strain is expected to be developed further.