Qualitative Risk Assessments (Release and Exposure Assessments) for the Risk of introduction of Highly Pathogenic Avian Influenza (H5N1) Virus into Ethiopia Via Wild Birds Trade Transiting in the Country and for the Risk of Transmission of Highly Pathogenic Avian Influenza (H5N1) Virus between Large Scale Commercial and Small Scale Commercial Poultry Farms in Ethiopia - Siraw, Bewket; Chaka, Hassen (International Food Policy Research Institute, 2009)