疑似预防接种异常反应是指在预防接种过程中或接种后发生的可能造成受种者机体组织器官、功能损害,且怀疑与预防接种有关的反应[1]。开展疑似预防接种异常反应监测,对于评价疫苗的安全性,改善预防接种服务质量,从而增强公众对预防接种的信心,具有重要意义[2]。 Suspected Vaccination Abnormal response refers to reactions that occur during or after vaccination, which may cause organ damage to organs and organs of the recipient, and are suspected of being associated with vaccination [1]. Carrying out the surveillance of abnormal response to suspected vaccination is of great significance for evaluating the safety of vaccines and improving the quality of vaccination services so as to enhance the public’s confidence in vaccination.