Joint impacts of media, vaccination and treatment on an epidemic Filippov model with application to COVID-19

被引:46
作者
Deng, Jiawei [1 ]
Tang, Sanyi [1 ]
Shu, Hongying [1 ]
机构
[1] Shaanxi Normal Univ, Sch Math & Informat Sci, Xian 710062, Peoples R China
基金
中国国家自然科学基金;
关键词
Filippov epidemic model; Containment strategies; Sliding domain; Global dynamics; COVID-19; BACKWARD BIFURCATION; CORONAVIRUS; DYNAMICS; SPREAD; VIRUS; TRANSMISSION; RESOURCES; STABILITY;
D O I
10.1016/j.jtbi.2021.110698
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Y A non-smooth SIR Filippov system is proposed to investigate the impacts of three control strategies (media coverage, vaccination and treatment) on the spread of an infectious disease. We synthetically consider both the number of infected population and its changing rate as the switching condition to implement the curing measures. By using the properties of the Lambert W function, we convert the proposed switching condition to a threshold value related to the susceptible population. The classical epidemic model involving media coverage, linear functions describing injecting vaccine and treatment strategies is examined when the susceptible population exceeds the threshold value. In addition, we consider another SIR model accompanied with the vaccination and treatment strategies represented by saturation functions when the susceptible population is smaller than the threshold value. The dynamics of these two subsystems and the sliding domain are discussed in detail. Four types of local sliding bifurcation are investigated, including boundary focus, boundary node, boundary saddle and boundary saddle-node bifurcations. In the meantime, the global bifurcation involving the appearance of limit cycles is examined, including touching bifurcation, homoclinic bifurcation to the pseudo-saddle and crossing bifurcation. Furthermore, the influence of some key parameters related to the three treatment strategies is explored. We also validate our model by the epidemic data sets of A/H1N1 and COVID-19, which can be employed to reveal the effects of media report and existing strategy related to the control of emerging infectious diseases on the variations of confirmed cases. (C) 2021 Elsevier Ltd. All rights reserved.
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页数:15
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