至於為何還會患病,一種可能是病毒有變種,要麽就是疫苗注射後,需要六周至兩個月才能fully protective....
至於為何還會患病,一種可能是病毒有變種,要麽就是疫苗注射後,需要六周至兩個月才能fully protective....
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