纵观新中国成立后的预防接种形式,可概括为三种,一是冷链装备之前的季节性分散式接种;二是冷链装备后按照计划免疫程序进行的分散式接种。一般每两个月运转一次;三是近年来正在逐步推广的集中式定点定时接种。下面根据我县的做法并参考有关文献,就计划免疫集中式定点定时接种介绍如下。 Looking at the form of vaccination after the founding of new China, can be summarized into three kinds, one is the seasonal dispersal vaccination before the cold chain equipment; the second is the distributed vaccination after the cold chain equipment according to the planned immunization program. Generally run once every two months; third is in recent years are gradually promoting the centralized fixed-point timing vaccination. The following according to the practice of my county and with reference to the literature, scheduled immunization scheduled intensive vaccination are as follows.