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Dynamical Analysis of an Age-Structured SVEIR Model with Imperfect Vaccine
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Dynamical Analysis of an Age-Structured SVEIR Model with Imperfect Vaccine
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Journal Article
Dynamical Analysis of an Age-Structured SVEIR Model with Imperfect Vaccine
2023
Overview
Based on the spread of COVID-19, in the present paper, an imperfectly vaccinated SVEIR model for latent age is proposed. At first, the equilibrium points and the basic reproduction number of the model are calculated. Then, we discuss the asymptotic smoothness and uniform persistence of the semiflow generated by the solutions of the system and the existence of an attractor. Moreover, LaSalle’s invariance principle and Volterra type Lyapunov functions are used to prove the global asymptotic stability of both the disease-free equilibrium and the endemic equilibrium of the model. The conclusion is that if the basic reproduction number Rρ is less than one, the disease will gradually disappear. However, if the number is greater than one, the disease will become endemic and persist. In addition, numerical simulations are also carried out to verify the result. Finally, suggestions are made on the measures to control the ongoing transmission of COVID-19.
Publisher
MDPI AG
Subject
