NEJM:接种BNT162b2 mRNA疫苗6个月内的安全性和效果分析

2021-11-04 MedSci原创 MedSci原创

经过6个月的随访,尽管疫苗效力逐渐下降,但BNT162b2具有良好的安全性,并且在预防Covid-19方面非常有效。

BNT162b2是一种脂质纳米颗粒配制的核苷修饰RNA疫苗,可编码严重急性呼吸综合征冠状病毒2(SARS-CoV-2)融合前稳定、膜锚定的全长刺突蛋白。BNT162b2对预防2019年冠状病毒病(Covid-19)非常有效,目前已在全球范围内获得批准、有条件批准或授权紧急使用。在最初授权时,无法获得疫苗接种后超过2个月的数据。

近日,顶级医学期刊NEJM上发表了一篇研究文章,研究人员进行了一项安慰剂对照、观察员盲法、多国、关键疗效试验,研究人员随机分配了44165名16岁或以上参与者和2264名12至15岁的参与者,间隔21天接受两次30ug的剂量BNT162b2或安慰剂。试验终点是经实验室检验确认的Covid-19的疫苗效力和安全性,均在疫苗接种后6个月内进行评估。

BNT162b2疫苗仍然是安全的,并且具有可接受的不良事件特征。很少有参与者出现导致退出试验的不良事件。在没有先前SARS-CoV-2感染证据且可以评估的参与者中,经过6个月的随访,针对Covid-19的疫苗有效性为91.3%(95%置信区间[CI]为89.0至93.2)。

疫苗效力逐渐下降。在没有证据表明既往感染SARS-CoV-2的参与者中,不同国家和不同年龄、性别、种族或民族以及Covid-19危险因素的人群的疫苗效力为86%至100%。针对严重疾病的疫苗效力为96.7%(95%CI为80.3至99.9)。在南非,SARS-CoV-2变异株B.1.351(或beta)占主导地位,研究人员观察到疫苗效力为100%(95%CI为53.5至100)。

由此可见,经过6个月的随访,尽管疫苗效力逐渐下降,但BNT162b2具有良好的安全性,并且在预防Covid-19方面非常有效。

原始出处:
 
Stephen J. Thomas,et al.Safety and Efficacy of the BNT162b2 mRNA Covid-19 Vaccine through 6 Months.NEJM.2021.https://www.nejm.org/doi/full/10.1056/NEJMoa2110345

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    2021-11-05 YB❤️💚

    学习了

    0

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    2021-11-05 查查佳佳

    默里大学下属的非营利组织DRIVE(Drug

    0

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