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arXiv 1402.4523physics.soc-phcond-mat.stat-mechq-bio.PE
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相互作用疾病的动力学

Dynamics of interacting diseases

Joaquín Sanz, Cheng-Yi Xia, Sandro Meloni, Yamir Moreno

摘要:

目前的传染病建模允许研究复杂和现实的情况,从人口到个人的描述水平。然而,大多数流行病模型都假设传播过程发生在单一层面上(无论是单一种群、元种群系统还是接触网络)。特别是,只有我们超越一个病原体一个网络的办法,才能解决相互依存的传染现象。在本文中,我们提出了一个框架,允许描述两个并发疾病的传播动力学。具体来说,我们分析了两种疾病的流行阈值为不同的情况下,还计算了时间演变特征的展开动态。结果表明,有一些区域的参数空间中,一种疾病的爆发是有条件的其他疾病的流行水平。此外,我们表明,SIS计划,在某些情况下,有限的和不消失的流行病阈值发现,即使在热力学极限的无标度网络。对于SIR情景,现象学更丰富,并且出现了额外的相互依赖性。我们还发现,SIS和SIR模型的次级阈值是不同的,这直接导致两种疾病之间的相互作用。因此,我们的工作解决了一个重要的问题,并为更全面地描述相互作用的疾病的动力学铺平了道路。

英文摘要:

Current modeling of infectious diseases allows for the study of complex and realistic scenarios that go from the population to the individual level of description. However, most epidemic models assume that the spreading process takes place on a single level (be it a single population, a meta-population system or a network of contacts). In particular, interdependent contagion phenomena can only be addressed if we go beyond the scheme one pathogen-one network. In this paper, we propose a framework that allows describing the spreading dynamics of two concurrent diseases. Specifically, we characterize analytically the epidemic thresholds of the two diseases for different scenarios and also compute the temporal evolution characterizing the unfolding dynamics. Results show that there are regions of the parameter space in which the onset of a disease's outbreak is conditioned to the prevalence levels of the other disease. Moreover, we show, for the SIS scheme, that under certain circumstances, finite and not vanishing epidemic thresholds are found even at the thermodynamic limit for scale-free networks. For the SIR scenario, the phenomenology is richer and additional interdependencies show up. We also find that the secondary thresholds for the SIS and SIR models are different, which results directly from the interaction between both diseases. Our work thus solve an important problem and pave the way towards a more comprehensive description of the dynamics of interacting diseases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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