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arXiv 0908.0408q-bio.PE
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一类SIS-家庭-传染病模型的灭绝时间

The time to extinction for an SIS-household-epidemic model

Tom Britton, Peter Neal

摘要:

我们分析了一个随机SIS流行病之间的有限人口划分成家庭。由于人口是有限的,流行病最终会灭绝,即,在人群中没有更多的传染源。我们研究了种群规模和家庭内传播对灭绝时间的影响。这是通过两个近似完成的。第一近似是适合于所有级别的家庭内传播,是基于一个Ornstein-Uhlenbeck过程近似的疾病波动的地方病水平依赖于一个大的人口。第二种近似方法适用于高水平的家庭内传播,并通过一个简单的均匀混合SIS模型来近似传染家庭的数量,其中家庭由个人代替。模拟研究支持的分析表明,灭绝的平均时间是最小的家庭内传播的中等水平。

英文摘要:

We analyse a stochastic SIS epidemic amongst a finite population partitioned into households. Since the population is finite, the epidemic will eventually go extinct, i.e., have no more infectives in the population. We study the effects of population size and within household transmission upon the time to extinction. This is done through two approximations. The first approximation is suitable for all levels of within household transmission and is based upon an Ornstein-Uhlenbeck process approximation for the diseases fluctuations about an endemic level relying on a large population. The second approximation is suitable for high levels of within household transmission and approximates the number of infectious households by a simple homogeneously mixing SIS model with the households replaced by individuals. The analysis, supported by a simulation study, shows that the mean time to extinction is minimized by moderate levels of within household transmission.

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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