The BioNTech/Pfizer vaccine is less effective in halting the spread of the Delta variant than that of previous strains of coronavirus, according to a preliminary study by Israel’s health ministry.
以色列衛生部的一項初步研究顯示,BioNTech/輝瑞(Pfizer)新冠疫苗阻止Delta變種傳播的效果,不如阻止此前新冠病毒毒株傳播的效果好。
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