Possible future waves of SARS-CoV-2 infection generated by variants of concern with a range of characteristics.

Possible future waves of SARS-CoV-2 infection generated by variants of concern with a range of characteristics.
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DOI:
10.1038/s41467-021-25915-7
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发表时间:
2021-09-30
影响因子:
16.6
通讯作者:
Keeling MJ
Keeling MJ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Dyson L;Hill EM;Moore S;Curran-Sebastian J;Tildesley MJ;Lythgoe KA;House T;Pellis L;Keeling MJ

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SARS-CoV-2的病毒复制提供了获得有利突变的机会,改变了病毒的传播性、疾病的严重程度和/或允许逃避天然或疫苗衍生的免疫。我们使用三个数学模型:一个简约的确定性模型与均匀混合;一个年龄结构模型;和一个随机输入模型来研究潜在的关注变量(VOCs)的影响。根据2021年5月英格兰的情况进行校准,我们发现推定VOCs的流行病学轨迹范围很广,取决于其传播性,免疫逃逸能力以及假定的VOC靶向疫苗的引入时间。我们证明,与居民变体相比具有显著传播优势的VOC,或具有免疫逃逸特性的VOC,可以产生与2020-2021年冬季浪潮相当的感染和住院浪潮。此外,一种传染性较低但表现出部分免疫逃逸的变异可能会引发一波感染,直到进一步放松控制措施才能发现。了解SARS-CoV-2新变种的潜在影响对于大流行规划非常重要。在这里,作者开发了一个模型,其中包含具有不同传播性和免疫逃避特性的假设新变种,并使用它来预测英国未来可能出现的流行浪潮。
Viral reproduction of SARS-CoV-2 provides opportunities for the acquisition of advantageous mutations, altering viral transmissibility, disease severity, and/or allowing escape from natural or vaccine-derived immunity. We use three mathematical models: a parsimonious deterministic model with homogeneous mixing; an age-structured model; and a stochastic importation model to investigate the effect of potential variants of concern (VOCs). Calibrating to the situation in England in May 2021, we find epidemiological trajectories for putative VOCs are wide-ranging and dependent on their transmissibility, immune escape capability, and the introduction timing of a postulated VOC-targeted vaccine. We demonstrate that a VOC with a substantial transmission advantage over resident variants, or with immune escape properties, can generate a wave of infections and hospitalisations comparable to the winter 2020-2021 wave. Moreover, a variant that is less transmissible, but shows partial immune-escape could provoke a wave of infection that would not be revealed until control measures are further relaxed. Understanding the potential impacts of new variants of SARS-CoV-2 is important for pandemic planning. Here, the authors develop a model incorporating hypothetical new variants with varying transmissibility and immune evasion properties, and use it to project possible future epidemic waves in the UK.
SARS-COV-2血统的估计可传播和影响B.1.1.7在英国。
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期刊: Science (New York, N.Y.)
影响因子: --
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发表时间: 2021-06-03
期刊: Vaccines
影响因子: 7.8
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