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arXiv 0802.2059q-bio.PE
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关于封闭异质群体中流行病的传播

On the spread of epidemics in a closed heterogeneous population

Artem S Novozhilov

摘要:

异质性是任何经历疾病的群体的重要特性。在这里,我们将异质群体理论的一般方法应用于流行病学中最简单的数学模型。特别是,一个SIR(易感染的去除)模型制定和分析不同来源的异质性。研究表明,非均质模型可以化为具有非线性传递函数的齐次模型,并给出了显式的传递函数。广泛使用的功率传递函数推导出一个非均匀模型与初始伽玛分布的疾病参数。因此,提供了一个很好地模拟现实的唯象模型的机械推导。在任意初始分布下,得到了流行病最终规模的方程,讨论了种群异质性的含义,特别指出了通常的矩封闭方法在研究模型的长期行为时可能导致错误的结论.

英文摘要:

Heterogeneity is an important property of any population experiencing a disease. Here we apply general methods of the theory of heterogeneous populations to the simplest mathematical models in epidemiology. In particular, an SIR (susceptible-infective-removed) model is formulated and analyzed for different sources of heterogeneity. It is shown that a heterogeneous model can be reduced to a homogeneous model with a nonlinear transmission function, which is given in explicit form. The widely used power transmission function is deduced from a heterogeneous model with the initial gamma-distribution of the disease parameters. Therefore, a mechanistic derivation of the phenomenological model, which mimics reality very well, is provided. The equation for the final size of an epidemic for an arbitrary initial distribution is found. The implications of population heterogeneity are discussed, in particular, it is pointed out that usual moment-closure methods can lead to erroneous conclusions if applied for the study of the long-term behavior of the 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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