很成熟了,每年只需一剂。但新冠变异株太多,注射疫苗后,到底体内能产生多长时间的抗体,还捉摸不透,估计近期也难二剂混打。
很成熟了,每年只需一剂。但新冠变异株太多,注射疫苗后,到底体内能产生多长时间的抗体,还捉摸不透,估计近期也难二剂混打。
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