目的通过分析1例接种麻疹风疹联合疫苗引起血小板减少性紫癜病例,探讨预防接种后异常反应的调查和处理。方法采用面对面病例调查和现场调查,描述患者发病情况。结果经过对案例的调查和综合分析,异常反应诊断专家组诊断为由接种麻疹风疹联合减毒活疫苗引起的1例血小板减少性紫癜异常反应。 Objective To investigate the cases of thrombocytopenic purpura caused by the inoculation of measles and rubella vaccine and to investigate the investigation and treatment of abnormal reaction after vaccination. Methods Face-to-face case investigation and field investigation were performed to describe the incidence of patients. Results After the case investigation and comprehensive analysis, the expert group diagnosed by abnormal reaction was diagnosed as an abnormal reaction of thrombocytopenic purpura caused by measles and rubella combined live attenuated vaccine.