永定县计划免疫保偿工作始于１９８８年７月，当时在凤城镇开展试点，取得经验后，１９８９年向全县铺开。但由于采取二级保偿制，随着工作的深入开展，其弊端也逐渐暴露出来。为使计免保偿工作抓得更落实、规范，我县于１９９７年９月改二级计免保偿为全县“五统一”管理，收 Yongding County, planned immunization work began in July 1988, when the pilot in Fengcheng Town, gained experience, spread to the county in 1989. However, as a result of the two-tier system of compensation, with the deepening of work, its drawbacks are gradually exposed. In order to make sure that the project of free-of-charge compensation is more implemented and standardized, our county changed the two-level plans in June 1997 to exempt from compensation for the administration of “five reunifications” of the county.