One might expect that these regions would divide into two groups, those free of highly-infectious poultry diseases and those that are not free of disease, with trade occurring within each group. However, this is not the case. The major importers of poultry products, China, Japan, and Russia, accept imports from all exporting regions in the model. The two major exporters, the US and Brazil, do not accept imports from each other and also ban imports from China, based on recurrent outbreaks of Newcastle Disease. The EU also bans imports from the US and from China. The.
