在美国每年数百万剂预防疫苗给儿童和成人接种,严重的不良反应很少见。但是由于疫苗使用量大,包括死亡在内的与疫苗接种时间相关的偶合性不良事件的确发生。当死亡发生在疫苗接种后短时间内,死者亲人和其他人自然而然会质疑死亡是否与疫苗接种有关。大量的证据表明疫苗的安全性, In the United States, millions of doses of vaccines are given to children and adults annually, and serious adverse reactions are rare. However, due to the large quantities of vaccines used, the incidence of coupled adverse events, including death, associated with the time of vaccination did occur. When death occurs shortly after vaccination, it is natural for the deceased’s relatives and others to question whether the death was associated with the vaccination. A lot of evidence shows the safety of the vaccine,