It is reported that this "combined vaccine" formed by the two vaccines, one of which is responsible for stimulating the immune system, the second is responsible for the enhanced immune response.
据报道，这种“联合疫苗”由两种疫苗组成，其中一种负责刺激免疫系统，第二种则负责增强免疫反应。
2
Widespread use of this modified toxoid began in the 1940s when it was combined with the tetanus and pertussis vaccines.