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Nature:80岁以上老人,需接种两针新冠疫苗才能达到更佳防护效果

2021-07-03 “生物世界”公众号 “生物世界”公众号

2021年6月30日,英国剑桥大学等机构的研究人员在国际顶尖学术期刊 Nature 发表了题为:Age-related immune response heterogeneity to SARS-Co

在全世界范围内,最广泛接种新冠疫苗是两款最早被FDA批准的mRNA疫苗,这两款mRNA均需接种两剂,以提供更好的保护作用。然而,对于80岁以上老人,疫苗的研究数据却很少,而老年人又是新冠高风险人群,因此,有必要采取具体措施提高老年人对疫苗的反应。

2021年6月30日,英国剑桥大学等机构的研究人员在国际顶尖学术期刊 Nature 发表了题为:Age-related immune response heterogeneity to SARS-CoV-2 vaccine BNT162b2 的研究论文。

该研究研究发现,约半数80岁以上人群在打了第二针辉瑞-BioNTech的mRNA疫苗后,才能实现最优的病毒中和作用。这项研究结果对于全球疫苗接种计划具有重要意义。

研究团队比较了80名老年人和60名年轻医护人员在接种疫苗后的免疫应答。

在打完第一针辉瑞-BioNTech的mRNA疫苗3周后,相比年轻组,80岁以上老年组产生足够中和抗体滴度的比例更低。

打完第一针后,相比年轻组,老年组对值得警惕的变异株——包括Alpha(B.1.1.7)和Beta(B.1.351)变异株——的中和能力更差。

然而,在第二针后,所有受试者的中和抗体应答均不相上下。

疫苗仍是防控新冠疫情的重中之重,但推动疫苗开发的临床试验却很少招募80岁以上的人。这一研究结果或有助于解释只打一针后报告的重症感染病例。

由于疫苗供应吃紧,一些国家已经决定或打算将两针间隔从3周延长至12周,但该论文作者发出了警告。老年人属于高风险人群,有必要采取特定方法来增强疫苗应答,尤其是在值得警惕的变异株大肆传播的地区。此外,如果疫苗延迟策略导致接种效果不理想,或为疫苗耐药性新变异株的出现提供土壤。

原始出处:

Collier, D.A., Ferreira, I.A.T.M., Kotagiri, P. et al. Age-related immune response heterogeneity to SARS-CoV-2 vaccine BNT162b2. Nature (2021). https://doi.org/10.1038/s41586-021-03739-1.

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    2021-07-26 liye789132251
  2. [GetPortalCommentsPageByObjectIdResponse(id=1885274, encodeId=96c818852e498, content=<a href='/topic/show?id=3b2112532d8' target=_blank style='color:#2F92EE;'>#Nat#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=88, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=12532, encryptionId=3b2112532d8, topicName=Nat)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2e6f107, createdName=liye789132251, createdTime=Mon Jul 26 23:16:24 CST 2021, time=2021-07-26, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=995772, encodeId=bb12995e72ef, content=学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=102, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210703/bb4c435996c647a69371bf55a2d576d1/48d68c18ad6043cf873582eef7e6c7f5.jpg, createdBy=1f402010073, createdName=如是我闻, createdTime=Sat Jul 03 16:32:50 CST 2021, time=2021-07-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1029687, encodeId=521f102968e3f, content=新冠肺炎,疫情何时才能消失, beContent=null, objectType=article, channel=null, level=null, likeNumber=100, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=公卫新人, createdTime=Sat Jul 03 01:16:24 CST 2021, time=2021-07-03, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1047384, encodeId=7e3d104e38434, content=疗效只是效果的众多方面之一,还要看对患者的获益,包括生活质量等因素共同决定效果的, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=CHANGE, createdTime=Sat Jul 03 01:16:24 CST 2021, time=2021-07-03, status=1, ipAttribution=)]
    2021-07-03 如是我闻

    学习了

    0

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    2021-07-03 公卫新人

    新冠肺炎,疫情何时才能消失

    0

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    2021-07-03 CHANGE

    疗效只是效果的众多方面之一,还要看对患者的获益,包括生活质量等因素共同决定效果的

    0

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