It is mainly transmitted through respiratory tract, infected by close contact with infected birds and their secretions and excreta, water contaminated by virus, and direct contact with virus strains. There is a high concentration of virus in the feces of infected waterfowl, and the influenza virus is transmitted from feces to mouth through polluted water sources. At present, no hidden carriers of human infection have been found, and there is no definitive evidence of human-to-human transmission.

Humans can also be infected by direct contact with poultry and their droppings infected with avian influenza virus or by direct contact with avian influenza virus.

Through droplets and contact with respiratory secretions is also a route of transmission.

If you directly contact articles with a considerable amount of virus, such as poultry feces, feathers, respiratory secretions, blood, etc., you can also cause infection through conjunctiva and damaged skin.