感染过新冠之后身体产生的抗体不高,需要再打疫苗才能产生较高的抗体水平,这对于当前的德尔塔变异尤为重要。
感染过新冠之后身体产生的抗体不高,需要再打疫苗才能产生较高的抗体水平,这对于当前的德尔塔变异尤为重要。
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