The model consisted of geographically BSE risk (GBR) levels, animal health conditions, tissue origins, tissue infective levels, BSE infectivity inactivation or clearance levels in the production processes and the use of end-products.

• 该模型包括地理性风险评估、动物的健康状况、组织来源、组织感染性水平、加工工艺对BSE病原的清除水平及产品的终用途等内容。