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早期数据显示 Omicron 部分避开了辉瑞和 BioNTech COVID-19 疫苗

2021-12-09 Allan MedSci原创

早期的观察似乎表明,虽然Omicron可能在一定程度上逃避疫苗保护,但Omicron 不太可能导致比以前的变种更严重的疾病。

南非的研究人员表示,他们的实验室实验“强烈”表明,与早期的 SARS-CoV-2 菌株相比,新的、高度突变的 Omicron 变体能够更好地逃避辉瑞和 BioNTech 的 COVID-19 疫苗 Comirnaty 引发的抗体免疫。然而,他们指出,他们已提交给 medRxiv 预印本的发现也表明,在接种过疫苗的人群中保留了“相当大的免疫力”。

非洲健康研究所执行主任 Willem Hanekom 表示:“需要确定这些重要实验室数据的临床意义,但结果很可能是疫苗引起的感染和疾病保护作用减弱所引起的。大多数疫苗学家都同意,目前的疫苗在面对 Omicron 感染时仍然可以预防严重的疾病和死亡”。

在这项研究中,研究人员测试了 12 名接种 Comirnaty 疫苗的人的血浆样本。一半的参与者之前没有感染 SARS-CoV-2 的记录,而其余 6 人之前在南非的第一波感染中感染了原始毒株。

根据结果​​,与原始病毒相比,他们的抗体中和 Omicron 变体的能力降低了 41 倍。科学家们指出,这表明 Omicron 能够比以前主导南非的 Beta 变体“更广泛地逃脱”。尽管如此,研究人员表示,在因先前感染而抗体滴度较高的参与者中,Omicron 的“逃脱是不完整的”。他们补充说,“先前感染,随后接种疫苗或加强免疫可能会增加中和水平”。

南非于上月底首次宣布发现 Omicron,此后该菌株很快被世界卫生组织标记为关注的变种。辉瑞和 BioNTech 当时表示,他们预计将在几周内获得实验室测试结果,以确定是否需要修改 Comirnaty。近日,辉瑞首席执行官 Albert Bourla 表示,如果需要,该公司可以在 2022 年 3 月之前开发一种专门针对 Omicron 的疫苗。 Bourla 还表示需要几周的时间才能获得关于当前疫苗是否提供足够保护的更明确的数据。同时,早期的观察似乎表明,虽然Omicron可能在一定程度上逃避疫苗保护,但Omicron 不太可能导致比以前的变种更严重的疾病。

 

原始出处:

https://firstwordpharma.com/story/5457775

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    2022-01-14 shock_melon
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    2022-09-21 xjy02
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    2022-04-27 sunylz
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    2021-12-09 ms4000001629637662

    学习了

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