主体传染性和易感性之间的异质性和相关性可以极大地影响流行病的动态
Beth M Tuschhoff1, David A Kennedy1
1Department of Biology and the Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, Pennsylvania, United States of America.
Journal of theoretical biology
|June 24, 2025
概括
主体传染性和易感性之间的相关性显著影响疾病传播. 积极的相关性会扩大流行病,而负面的相关性会减少流行病,为公共卫生揭示了关键的见解.
科学领域:
- 流行病学 流行病学
- 数学生物学 数学生物学
- 传染病建模 传染病建模
背景情况:
- 主体在传播和易感性上的异质性单独影响疾病动态.
- 两种异质性及其相关性的综合影响在很大程度上仍未被探索.
研究的目的:
- 调查同时存在的宿主异质性在传播和易感性以及它们的相关性如何影响疾病动态.
- 在流行病学模型中解决这些异质性之间的相关性在流行病学模型中的研究不足的作用.
主要方法:
- 系统地审查已发表的文献,以确定知识差距.
- 开发和分析一个随机的,基于个体的SIR (易感染-感染-恢复) 模型.
- 包括可传染性和易感性之间的灵活相关性 (正,负,零).
- 在纽约市的mopox动态中应用SEIR (易受-暴露-感染-恢复) 模型.
主要成果:
- 传染性和易感性之间的正相关性导致更大,更快,更有可能发生重大流行病.
- 负相关性导致较小和不太可能的主要流行病与非相关的病例相比.
- 敏感性的异质性可以增加疫情的规模和可能性,并产生积极的相关性,特别是在较低的R0 (基本繁殖数) 时.
- 积极的相关性可以驱动主要的流行病,即使R0低于1 (次临界).
- 纽约市的Mopox疫情动态可以合理地通过易感性和传染性之间的正相关性来解释.
结论:
- 主体传染性和易感性之间的相关性是疾病动态的深刻驱动因素,通常比单独的异质性更重要.
- 了解这些相关性对于准确的疾病预测和有效的公共卫生干预至关重要.
- 该研究强调需要将相关异质性纳入流行病学模型,以全面了解传染病传播.
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