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arXiv 2202.00322q-bio.PEmath.DS
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具有全局和局部传染的SIR--模型的分析

Analysis of an SIR--model with global and local infections

Thomas Götz

摘要:

考虑了一类传染病模型,其中疾病的传播既可以通过全球接触,也可以通过局部最近邻相互作用。经典的SIR模型描述的全球相互作用的扩展,增加了额外的方程的密度的本地对在不同的流行病状态。局部参数$p\in [0,1]$表征全局或局部感染的概率。所得到的模型的平衡分析依赖的局部参数和病原体的传播速率。得到了再生数与局部参数和疾病参数的显式表达式。瞬态模拟证实了这些发现。一个感染者和一个易感者的相邻对可以被认为是活跃的对,因为疾病的局部传播只能在这种情况下发生。我们的分析表明,活性对的分数是最小的局部参数的中间值。

英文摘要:

An epidemic model where disease transmission can occur either through global contacts or through local, nearest neighbor interactions is considered. The classical SIR--model describing the global interactions is extended by adding additional equations for the density of local pairs in different epidemic states. A locality parameter $p\in [0,1]$ characterizes the probability of global or local infections. The equilibria of the resulting model are analyzed in dependence of the locality parameter and the transmission rate of the pathogen. An explicit expression for the reproduction number in terms of the locality parameter and the disease parameters is obtained. Transient simulations confirm these findings. Neighboring pairs of one infected and one susceptible can be considered as active pairs, since local transmission of the disease can only occur in that situation. Our analysis shows, that the fraction of active pairs is minimal for intermediate values of the locality parameter.

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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