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arXiv 2109.05964physics.soc-phcs.SYeess.SYq-bio.PE
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两种群SIR模型及降低流行病死亡率的策略

Two-population SIR model and strategies to reduce mortality in pandemics

Long Ma, Maksim Kitsak, Piet Van Mieghem

摘要:

尽管对严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)的传播机制进行了许多研究,但有效降低死亡率仍然具有挑战性。在这项工作中,我们应用一个两种群易感-感染-移除(SIR)模型来研究当老年人和非老年人之间的接触由于老年人的高死亡风险而减少时COVID-19的传播。我们发现,减少两个种群之间的联系可以延迟死亡曲线,但不能很好地降低最终死亡率。我们提出了一个合并的SIR模型,它建议老年人在初始阶段少与非老年人的联系互动,但以后多与非老年人的关系互动,以降低最终的死亡率。最后,对老年枢纽个体进行免疫接种也可以显著降低死亡率。

英文摘要:

Despite many studies on the transmission mechanism of the Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), it remains still challenging to efficiently reduce mortality. In this work, we apply a two-population Susceptible-Infected-Removed (SIR) model to investigate the COVID-19 spreading when contacts between elderly and non-elderly individuals are reduced due to the high mortality risk of elderly people. We discover that the reduction of connections between two populations can delay the death curve but cannot well reduce the final mortality. We propose a merged SIR model, which advises elderly individuals to interact less with their non-elderly connections at the initial stage but interact more with their non-elderly relationships later, to reduce the final mortality. Finally, immunizing elderly hub individuals can also significantly decrease mortality.

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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