我地区对1995年出生的214名儿童复查，无卡痕率约占15％，影响免疫效果。鉴于这种状况，笔者通过多年来的工作实践和对失败经验的总结，认为卡痕率低可能与操作技术和剂量不准有关。现分析如下：（1）稀释疫苗时药液没的摇匀，导致部份疫苗量不足而没有卡痕，疫苗量部份人超大 In our region, 214 children born in 1995 were re-examined without card-capping rate of about 15%, affecting the immunization effect. In view of this situation, the author through many years of work experience and summary of the failure of experience, that the low rate of card may be related to the operation of technology and dose is not allowed. Now analysis is as follows: (1) when diluting the vaccine did not shake the vaccine, resulting in some lack of vaccine without the mark, the vaccine amount of some large people