[The economic loss of poliomyelitis outbreak in Pi County and economic beneficial analysis on EPI].

In 1989, there was a poliomyelitis outbreak in Pi county, Jiangsu province. The total case number was 597 in which 52 died. It caused the patients' families and national economic loss 2,713,107.32 yuan and lessened creating value of 18,583,942.35 yuan for the country. The outbreak was mainly caused by the fact that many children did not set vaccination card, missed vaccination chance and lacked in immunity to polio. So the ratio of cost-benefit will be expected to reach 1:6.85, and the net benefit of 2,317,268.16 yuan can be gained if the task of EPI is implemented well to avoid the occurrence of outbreak.