arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.08125physics.soc-phcs.SIq-bio.PE
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巴西COVID-19流行病动态建模的复杂网络社会交互层

Social Interaction Layers in Complex Networks for the Dynamical Epidemic Modeling of COVID-19 in Brazil

Leonardo F. S. Scabini, Lucas C. Ribas, Mariane B. Neiva, Altamir G. B. Junior, Alex J. F. Farfán, Odemir M. Bruno

摘要:

由于SARS-CoV-2病毒引起的大流行,我们目前生活在一种不确定的状态中。传染病传播涉及若干因素,如每个城市/国家的个别特点。流行病动力学的真实形态是一个庞大的复杂系统,就像大多数社会系统一样。在这种情况下,复杂网络是分析这些系统的一个很好的候选者,因为它们能够处理结构和动力学特性。因此,这项研究提出了一种使用多层复杂网络来模拟COVID-19流行病的新方法,其中节点代表人,边是社会联系人,层代表不同的社会活动。该模型改进了传统的SIR模型,并通过分析未来可能的行动及其后果来研究巴西的疫情。该网络使用感染、死亡和住院时间的统计数据来表征。为了模拟隔离,社交距离或预防措施,我们删除层和/或减少社交接触的强度。结果表明,即使采取各种乐观的假设,巴西目前的隔离水平仍然可能导致医疗保健系统的危急情况和相当大的死亡人数(平均为149,000人)。如果所有活动恢复正常,疫情增长可能会急剧增加,对ICU床位的需求可能会超过该国容量的3倍。这肯定会导致灾难性的情况,因为即使考虑到所有病例都得到有效治疗,我们的估计也达到平均212 000人死亡。增加隔离(直至封锁)是将情况保持在医疗保健系统能力范围内的最佳选择,除了确保新病例发生率更快地下降(月差异)和显著减少死亡人数(平均87,000人)。

英文摘要:

We are currently living in a state of uncertainty due to the pandemic caused by the Sars-CoV-2 virus. There are several factors involved in the epidemic spreading such as the individual characteristics of each city/country. The true shape of the epidemic dynamics is a large, complex system such as most of the social systems. In this context, Complex networks are a great candidate to analyze these systems due to their ability to tackle structural and dynamical properties. Therefore this study presents a new approach to model the COVID-19 epidemic using a multi-layer complex network, where nodes represent people, edges are social contacts, and layers represent different social activities. The model improves the traditional SIR and it is applied to study the Brazilian epidemic by analyzing possible future actions and their consequences. The network is characterized using statistics of infection, death, and hospitalization time. To simulate isolation, social distancing, or precautionary measures we remove layers and/or reduce the intensity of social contacts. Results show that even taking various optimistic assumptions, the current isolation levels in Brazil still may lead to a critical scenario for the healthcare system and a considerable death toll (average of 149,000). If all activities return to normal, the epidemic growth may suffer a steep increase, and the demand for ICU beds may surpass 3 times the country's capacity. This would surely lead to a catastrophic scenario, as our estimation reaches an average of 212,000 deaths even considering that all cases are effectively treated. The increase of isolation (up to a lockdown) shows to be the best option to keep the situation under the healthcare system capacity, aside from ensuring a faster decrease of new case occurrences (months of difference), and a significantly smaller death toll (average of 87,000).

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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