Role of media coverage in a SVEIR-I epidemic model with nonlinear incidence and spatial heterogeneous environment

Pengfei Liu; Yantao Luo; Zhidong Teng; Pengfei Liu; Yantao Luo; Zhidong Teng

doi:10.3934/mbe.2023698

Mathematical Biosciences and Engineering

2023, Volume 20, Issue 9: 15641-15671. doi: 10.3934/mbe.2023698

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Research article

Role of media coverage in a SVEIR-I epidemic model with nonlinear incidence and spatial heterogeneous environment

College of Mathematics and Systems Science, Xinjiang University, Urumqi 830017, China

Academic Editor: Yang Kuang

Received: 10 June 2023 Revised: 16 July 2023 Accepted: 21 July 2023 Published: 28 July 2023

In this paper, we propose a SVEIR-I epidemic model with media coverage in a spatially heterogeneous environment, and study the role of media coverage in the spread of diseases in a spatially heterogeneous environment. In a spatially heterogeneous environment, we first set up the well-posedness of the model. Then, we define the basic reproduction number $ R_0 $ of the model and establish the global dynamic threshold criteria: when $ R_0 < 1 $, disease-free steady state is globally asymptotically stable, while when $ R_0 > 1 $, the model is uniformly persistent. In addition, the existence and uniqueness of the equilibrium state of endemic diseases were obtained when $ R_0 > 1 $ in homogeneous space and heterogeneous diffusion environment. Further, by constructing appropriate Lyapunov functions, the global asymptotic stability of disease-free and positive steady states was established. Finally, through numerical simulations, it is shown that spatial heterogeneity can increase the risk of disease transmission, and can even change the threshold for disease transmission; media coverage can make people more widely understand disease information, and then reduce the effective contact rate to control the spread of disease.
- SVEIR-I epidemic model,
- nonlinear incidence,
- media coverage,
- global stability,
- spatial heterogeneous environment
Citation: Pengfei Liu, Yantao Luo, Zhidong Teng. Role of media coverage in a SVEIR-I epidemic model with nonlinear incidence and spatial heterogeneous environment[J]. Mathematical Biosciences and Engineering, 2023, 20(9): 15641-15671. doi: 10.3934/mbe.2023698

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Abstract

In this paper, we propose a SVEIR-I epidemic model with media coverage in a spatially heterogeneous environment, and study the role of media coverage in the spread of diseases in a spatially heterogeneous environment. In a spatially heterogeneous environment, we first set up the well-posedness of the model. Then, we define the basic reproduction number $ R_0 $ of the model and establish the global dynamic threshold criteria: when $ R_0 < 1 $, disease-free steady state is globally asymptotically stable, while when $ R_0 > 1 $, the model is uniformly persistent. In addition, the existence and uniqueness of the equilibrium state of endemic diseases were obtained when $ R_0 > 1 $ in homogeneous space and heterogeneous diffusion environment. Further, by constructing appropriate Lyapunov functions, the global asymptotic stability of disease-free and positive steady states was established. Finally, through numerical simulations, it is shown that spatial heterogeneity can increase the risk of disease transmission, and can even change the threshold for disease transmission; media coverage can make people more widely understand disease information, and then reduce the effective contact rate to control the spread of disease.

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