为进一步贯彻伟大领袖毛主席“把医疗卫生工作的重点放到农村去”的指示,为使边远地区的儿童都能接受卡介苗接种以预防结核病,如果仍按原规程规定液体卡介苗效期二周,冻干卡介苗效期一年进行工作。菌苗将由于运输时间长而过期失效,影响边远山区儿童的使用。为此,我们于1966年开始对菌苗延长效期问题进行了试验观察,并在结素试验复查结果出来之后,于1966年11月将液体卡介苗效期改为五周,冻干菌苗效期 In order to further implement the instructions given by Chairman Mao, the great leader, to “focus medical and health work in the rural areas”, in order to enable children in remote areas to receive BCG vaccination to prevent tuberculosis, if the duration of liquid BCG vaccine is still two weeks according to the original regulations, Freeze-dried BCG work for one year. Vaccines will expire due to long transit times, affecting the use of children in remote mountainous areas. To this end, we started in 1966 on the extension of the vaccine trial of the issue of delay, and in the tuberculin test results came out, in November 1966 the liquid BCG vaccine efficacy was changed to five weeks, lyophilized vaccine efficacy period