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Using a stochastic simulation model, we estimated the effectiveness of the three BSE interventions (SRM removal, post-mortem testing and cohort culling) in Japan, in terms of the amount of bovine ID50 that would be prevented from entering the human food supply and the number of life years that would be saved from resulting vCJD cases. The average reduction of the BSE load on the human food supply under SRM removal was 97% over the period from 2002 to 2009. The average reduction of the BSE load under most-mortem testing was 83% over the period from 2002 to 2007. The risk reducing effect of the three interventions combined was 99%. The maximum number of life years saved by the three interventions combined was 40.84 in 2006. [ABSTRACT FROM AUTHOR]