卡痕是脆断的裂纹源。
结果外来儿童卡介苗接种率、卡痕率明显低于本地儿童。
Results The rate of BCG vaccination was lower in temporary resident children.
方法观察367名接种卡介苗后满12周儿童卡痕形成情况，并对其纯蛋白衍生物试验阳转结果进行分析。
Methods To observe the scar shapes of 367 infants aged 12 weeks after BCG vaccination and to analyze the purified protein derivative seroconversion results.
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