XBB.1.5变种毒株侵入中国毒性更强?专家这样说
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中国国务院联防联控机制8日下午举行新闻发布会,说明第10版防控方案相关情况。(取自香港01网站)
新冠肺炎XBB.1.5变种病毒株日前在中国现踪,外界关注是否会在中国再引发新一波流行,造成严重的重症与死亡后果。中国疾控中心8日表示,目前中国共有16例XBB的本土关联病例,就现有报告来看,重症与死亡比例未增加。
香港01网站报道,中国国务院联防联控机制8日下午举行新闻发布会,在鬆绑疫情管控措施首日,说明第10版防控方案相关情况。中国疾控中心病毒病所研究员陈操在会中表示,XBB系列的变异株主要是在美国、印度、马来西亚和新加坡等国家流行。近期新产生一个名为XBB.1.5的分支,这个分支在美国新增的患者中,病例较多,并呈现增长趋势。截至今年7日,全球已有35个国家和地区监测到XBB.1.5,然而像是日本等疫情防控较好的国家来看,XBB.1.5并未成为优势病毒株。
陈操指出,从去年8月1日到今年1月7日,中国总共监测到了16例XBB本土的关联病例,均为XBB.1的进化分支。他强调,虽然免疫逃逸能力明显增加,然而从报道和研究来看,并没有观察到感染了XBB系列变异株的患者重症和死亡比例增加,也就是它的致病力并没有明显增加。
据中疾控微信公众号于4日发布,去年10月至12月间,中国境外移入病例中,共发现199例XBB变异病毒株,当中4例是XBB.1.5;在本土病例中发现的XBB,全部是XBB.1,暂时未发现XBB.1.5。
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