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河北省在所辖１２个市、地，采用单纯随机抽样的方法抽取１９个县（区、县级市），每个县随机抽取２个乡（镇、街道），每个乡采用批质量保证抽样方法抽取２９名１９９３年１月１日—１２月３１日出生的儿童，调查卡介苗、口服脊髓灰质炎疫苗、白百破混合制剂、麻疹疫苗在１２月龄内接种情况，３８个乡四种疫苗接种率全部达到８５％，３１个乡达到９０％，占调查乡的８１．６％。卡痕率达９３．３％的主要原因是基层防保人员反复注射卡介苗的结果。
Hebei Province, under the jurisdiction of 12 municipalities and districts, using a simple random sampling method selected 19 counties (districts, county-level cities), each county randomly selected two townships (towns, streets), each township batch quality assurance Sampling methods Twenty-nine children born from January 1 to December 31, 1993 were enrolled in this study. The survey was conducted on BCG vaccine, oral polio vaccine, mixed baibai tablet, measles vaccine at 12 months of age and 38 townships of four vaccines All inoculation rates reached 85%, 31 townships reached 90%, accounting for 81.6% of township survey. The main reason for the card-tracking rate of 93.3% is the result of repeated injections of BCG by grassroots security guards.