NEJM:头对头研究证实mRNA-1273疫苗的有效性优于BNT162b2疫苗

2022-01-17 MedSci原创 MedSci原创

研究认为,在接种mRNA-1273或BNT162b2疫苗后,新冠肺炎病毒的感染风险显著降低,并且mRNA-1273疫苗后的效果优于BNT162b2疫苗。

先前的研究中,mRNA新冠肺炎疫苗表现出超过90%的有效性,其中BNT162b2疫苗的有效性为95%,mRNA-1273疫苗的有效性为94%,随后的真实世界研究中也证实了疫苗的效果。近日研究人员在不同人群中直接比较了二种疫苗的有效性。


研究人员使用美国退伍军人电子健康记录数据,参与研究的退伍军人在2021年1月4日至5月14日期间接受了第一剂 BNT162b2或 mRNA-1273疫苗注射,这一研究期间,主要是Sars-cov-2 b 1.1.7(alpha)变异体流行。为了评估疫苗接种对B.1.617.2(delta)变异株的效果,研究人员在2021年7月1日至9月20日期间进行了第二次研究。研究的主要结果是有记录的严重急性呼吸系统综合征冠状病毒2(SARS-CoV-2)感染、有症状的Covid-19、因Covid-19住院、因Covid-19进入重症监护病房(ICU)以及因Covid-19死亡。
每个疫苗接种组均包括219842人。在α变异株流行期间(24周),BNT162b2组记录的感染风险为每1000人5.75次,mRNA-1273组为每1000人4.52次。与mRNA-1273相比,BNT162b2组每1000人额外发生1.23人次感染,额外有0.44人次症状性Covid-19患者,额外0.55人次因covid-19住院治疗,额外0.01人次因Covid-19入住ICU治疗,额外 Covid-19死亡0.02人。在delta变异株流行期间(12周),与mRNA-1273相比,BNT162b2组每1000人中额外发生6.54次确诊感染事件。

比较mRNA-1273 vs BNT162b2疫苗的有效性

研究认为,在接种mRNA-1273或BNT162b2疫苗后,新冠肺炎病毒的感染风险显著降低,并且mRNA-1273疫苗后的效果优于BNT162b2疫苗。
原始出处:
Barbra A. Dickerman et al. Comparative Effectiveness of BNT162b2 and mRNA-1273 Vaccines in U.S. Veterans. N Engl J Med,January 13, 2022.

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    2022-01-17 病毒猎手

    不过,对于预防奥密克戎时,可能结果又不一样了,需要再次开展研究

    0

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