偃师市市直１９９１－１９９３年入保儿童四苗基础免疫情况调查报告任安民１方法以１９９１年６月～１９９３年５月间市直入保的全部儿童为对象，查原始接种卡，凡一岁以内四苗基础免疫卡上记录不全者，均以不正规统计。２结果２．１接种率：在此期间内，共入保５７９人，... Yanshi City 1991-1993 years insured child four seedlings based on the investigation of the immune situation Ren An-min 1 method 1991 to June 1993 to May 1993 directly under the insured for all children, check the original vaccination card, where a year-old Within the four vaccine-based immune card record incomplete, are irregular statistics. 2 Results 2.1 The vaccination rate: during this period, a total of 579 insurance, ...