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arXiv 1608.04049physics.soc-phq-bio.PE
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复杂网络中无症状感染者对疾病-行为耦合动力学的影响

Impact of asymptomatic infection on coupled disease-behavior dynamics in complex networks

Hai-Feng Zhang, Jia-Rong Xie, Han-Shuang Chen, Can Liu, Michael Small

摘要:

如何建立疾病与行为反应之间的相互作用模型(所谓的耦合疾病-行为相互作用)的研究引起了越来越多的关注。由于缺乏明显的疾病临床证据,或与疾病相关的信息不完整,无法感知感染的风险,并可能导致不适当的行为反应。因此,如何定量分析无症状感染者对疾病和行为反应之间相互作用的影响尤为重要。本文在复杂网络框架下,通过将感染个体分为U状态(无明显临床症状,记为U)和I状态(有明显临床症状,记为I),研究了疾病-行为耦合交互作用模型。易感个体可以被U-或I-节点感染,然而,由于U-节点不容易被观察到,易感个体在接触I-节点时采取行为反应\emph{only}。分别在改进的易感-感染-易感(SIS)模型和改进的易感-感染-传播(SIR)模型中考虑了这一机制。然后,对传播动力学中最受关注的问题之一:两种模型的传染病阈值分别用两种方法给出。分析结果\emph{quantitatively}描述了无症状感染者、知晓率、网络结构等不同因素对流行阈值的影响。此外,由于SIR模型的不可逆过程,改进的SIR模型的抑制效果弱于改进的SIS模型。

英文摘要:

Studies on how to model the interplay between diseases and behavioral responses (so-called coupled disease-behavior interaction) have attracted increasing attention. Owing to the lack of obvious clinical evidence of diseases, or the incomplete information related to the disease, the risks of infection cannot be perceived and may lead to inappropriate behavioral responses. Therefore, how to quantitatively analyze the impacts of asymptomatic infection on the interplay between diseases and behavioral responses is of particular importance. In this Letter, under the complex network framework, we study the coupled disease-behavior interaction model by dividing infectious individuals into two states: U-state (without evident clinical symptoms, labelled as U) and I-state (with evident clinical symptoms, labelled as I). A susceptible individual can be infected by U- or I-nodes, however, since the U-nodes cannot be easily observed, susceptible individuals take behavioral responses \emph{only} when they contact I-nodes. The mechanism is considered in the improved Susceptible-Infected-Susceptible (SIS) model and the improved Susceptible-Infected-Recovered (SIR) model, respectively. Then, one of the most concerned problems in spreading dynamics: the epidemic thresholds for the two models are given by two methods. The analytic results \emph{quantitatively} describe the influence of different factors, such as asymptomatic infection, the awareness rate, the network structure, and so forth, on the epidemic thresholds. Moreover, because of the irreversible process of the SIR model, the suppression effect of the improved SIR model is weaker than the improved SIS model.

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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