新变种BA.4、BA.5超凶!哈佛研究数据揭差异
文章来源: 苹果日报新闻网 于
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美国哈佛医学院最新研究数据显示,新型冠状病毒肺炎(COVID-19)变异株Omicron的最新变种BA.4、BA.5,似乎在已感染过以及打完第三剂疫苗的人身上,都能逃逸抗体攻击。不过研究团队也指出,接种疫苗仍可提供实质保护。
根据美国有线电视新闻网(CNN)22日报导,哈佛医学院贝斯以色列女执事医疗中心的研究团队发表新数据,指出曾感染COVID-19或是接种疫苗引起的中和抗体,对抗BA.4、BA.5变种病毒的反应,比原始COVID-19病毒低了数倍。
贝斯以色列女执事医疗中心病毒学和疫苗研究中心主任布鲁克(Dan
Barouch)说:”我们观察到,跟BA.1和BA.2相比,疫苗接种和感染BA.4及BA.5诱导的中和抗体效价低了3倍。”
布鲁克进一步说:”我们的数据显示,这些新的Omicron亚变种,可能会导致高水平疫苗免疫力和天然BA.1和BA.2免疫力的这些族群,感染人数激增。”不过布鲁克也补充,疫苗免疫可能仍会为BA.4及BA.5的重症提供实质保护力。
这项研究结果发表在最新一期《新英格兰医学杂志》( New England Journal of Medicine
,NEJM)。
报导指,目前疫苗制造商正研究更新的疫苗,以防堵这些变种病毒的更强免疫逃逸反应。
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