NEJM:美国北卡罗来纳州新冠肺炎疫苗接种后9个月疗效评估

2022-03-10 MedSci原创 MedSci原创

BNT162b2、mRNA-1273和Ad26.COV2.S,这三款疫苗在降低Covid-19相关住院和死亡方面均具有持久的效果,但随着时间的推移,对预防感染的保护作用的减弱

仅在美国,严重急性呼吸系统综合征冠状病毒2(SARS-CoV-2)就导致5000多万例感染,造成80多万人死亡,疫苗的有效性和持久性是结束疫情的关键。2020年12月至2021年2月期间,有三种Covid-19疫苗——BNT162b2、mRNA-1273和Ad26.COV2.S获得FDA批准应用,然而在2021年夏秋后,疫苗接种后SARS-CoV-2感染病例再次增加,导致了人们对疫苗长期有效性的担忧,特别是B.1.617.2(delta)等变异株的出现进一步加重了担忧。近日研究人员考察了完成接种后9个月疫苗的有效性。


研究人员将北卡罗来纳州Covid-19监测系统和Covid-19疫苗管理系统数据相关联,提取了约1060万居民在9个月期间(2020年12月11日至2021年9月21日8日)的Covid-19相关疫苗接种和感染数据。使用Cox回归模型来评估BNT162b2、mRNA-1273和Ad26.COV2.S 疫苗在降低Covid-19患病、住院和死亡风险方面的有效性。
2种mRNA疫苗,BNT162b2(每剂量30μg)和mRNA-1273(每剂量100μg)疫苗对于预防Covid-19的有效性在第一次接种后2个月分别为94.5%和95.9%,在7个月时分别下降至66.6%和80.3%。在较早完成BNT162b2和mRNA-1273接种的人群中,从6月中旬到7月中旬,当delta变异体占流行期间,疫苗的有效性分别下降了约10-15%。Ad26.COV2.S(5×1010病毒颗粒)单剂方案,接种后1个月对Covid-19的预防效果为74.8% ,5个月时下降至59.4%。三种疫苗在预防新冠肺炎相关住院和死亡方面的效果均高于预防感染方面,且随时间的下降幅度更低,总体上mRNA疫苗的效果优于腺病毒载体疫苗。

疫苗效果随时间的变化

研究认为,BNT162b2、mRNA-1273和Ad26.COV2.S,这三款疫苗在降低Covid-19相关住院和死亡方面均具有持久的效果,但随着时间的推移,对预防感染的保护作用的减弱。
原始出处:
Dan-Yu Lin et al. Effectiveness of Covid-19 Vaccines over a 9-Month Period in North Carolina. N Engl J Med,March 10, 2022.

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    2022-03-13 ms1000000564332448

    很好!

    0

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    2022-03-11 萌宝嘟嘟

    好东西,谢谢分享!

    0

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    2022-03-11 ms7000001031705413

    很好

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1915721, encodeId=5b401915e21cc, content=<a href='/topic/show?id=2b40e04130e' target=_blank style='color:#2F92EE;'>#疗效评估#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=70413, encryptionId=2b40e04130e, topicName=疗效评估)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=2f5a410, createdName=zxxiang, createdTime=Thu Apr 14 08:20:27 CST 2022, time=2022-04-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1202200, encodeId=11d01202200ed, content=很好!, beContent=null, objectType=article, channel=null, level=null, likeNumber=72, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=106e6543620, createdName=ms1000000564332448, createdTime=Sun Mar 13 12:27:56 CST 2022, time=2022-03-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1258147, encodeId=1b22125814ebc, content=<a href='/topic/show?id=f538e0501e9' target=_blank style='color:#2F92EE;'>#疫苗接种#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=62, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=70501, encryptionId=f538e0501e9, topicName=疫苗接种)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=5c0050, createdName=lishiwen, createdTime=Sat Mar 12 09:20:27 CST 2022, time=2022-03-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1201774, encodeId=a5ab1201e7414, content=好东西,谢谢分享!, beContent=null, objectType=article, channel=null, level=null, likeNumber=85, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=d0be2111725, createdName=萌宝嘟嘟, createdTime=Fri Mar 11 20:04:34 CST 2022, time=2022-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1201737, encodeId=a88b1201e37fd, content=很好, beContent=null, objectType=article, channel=null, level=null, likeNumber=80, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ce496545404, createdName=ms7000001031705413, createdTime=Fri Mar 11 16:47:16 CST 2022, time=2022-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1201736, encodeId=bc7d1201e36d9, content=好好, beContent=null, objectType=article, channel=null, level=null, likeNumber=73, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ce496545404, createdName=ms7000001031705413, createdTime=Fri Mar 11 16:47:03 CST 2022, time=2022-03-11, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1201567, encodeId=07df120156e9d, content=<a href='/topic/show?id=46ce580e865' target=_blank style='color:#2F92EE;'>#新冠肺炎#</a>学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=128, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=58078, encryptionId=46ce580e865, topicName=新冠肺炎)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=6e745543773, createdName=风中逐叶, createdTime=Thu Mar 10 22:46:15 CST 2022, time=2022-03-10, status=1, ipAttribution=)]
    2022-03-11 ms7000001031705413

    好好

    0

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    2022-03-10 风中逐叶

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