种痘预防天花的效果是肯定的。在正常情况下,种痘后只发生轻度的局限性的感染过程,从而获得免疫。但在不正常的情况下,如痘苗毒力过强,机体免疫机能缺损,或使用不当,禁忌症掌握不严格,都可能发生某种异常反应。我们在进行痘苗反应观察时,曾遇到种痘后多形疹(红斑水泡型)、血管性水肿、匐行痘、种痘后晕厥各一例,现整理报告如下。 The effect of vaccination to prevent smallpox is affirmative. Under normal circumstances, only a mild localized infection occurs after vaccination, thereby obtaining immunity. However, abnormal circumstances, such as vaccinia virulence too strong, the body immune function defect, or improper use, contraindications control is not strict, may occur some kind of abnormal reaction. We are in the observation of vaccinia, had encountered after the multiplication of pox herpes (erythema blisters), angioedema, prostatitis pox, vaccination after a case of syncope, are now organized as follows.