由于疫苗的有效期是从成品的效力试验开始计算的，以下三个方面对疫苗有效期

Since the validity period of the vaccine is calculated from the efficacy test of the finished product, the following three aspects should also be considered for the impact of the vaccine validity period, namely, the storage time of each component during the production process and before preparation, and the combined vaccine before and after the efficacy test. Save time.

Since the validity of the vaccine is calculated from the beginning of the effectiveness trial of the finished product, the following three aspects of the effect on the validity of the vaccine should also be considered, namely, the preservation time of each component during the production process and before the preparation, and the preservation time of the combined vaccine after the effectiveness trial begins.

Since the validity period of the vaccine is calculated from the efficacy test of the finished product, the following three aspects should also be considered: the storage time of each component in the production process and before preparation, and the storage time of the combined vaccine before and after the start of the efficacy test.<br>