養鶏
HPAI A(H5N1) is considered an avian disease, although there is some evidence of limited human-to-human transmission of the virus. A risk factor for contracting the virus is handling of infected poultry, but transmission of the virus from infected birds to humans is inefficient. Poultry farming practices have changed due to H5N1. The cost of poultry farming has increased, while the cost to consumers has gone down, due to fears from H5N1 driving demand below supply.