Elsevier

Results in Physics

Volume 30, November 2021, 104775
Results in Physics

Stochastic COVID-19 SEIQ epidemic model with time-delay

https://doi.org/10.1016/j.rinp.2021.104775Get rights and content
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Abstract

In this work, we consider an epidemic model for corona-virus (COVID-19) with random perturbations as well as time delay, composed of four different classes of susceptible population, the exposed population, the infectious population and the quarantine population. We investigate the proposed problem for the derivation of at least one and unique solution in the positive feasible region of non-local solution. For one stationary ergodic distribution, the necessary result of existence is developed by applying the Lyapunov function in the sense of delay-stochastic approach and the condition for the extinction of the disease is also established. Our obtained results show that the effect of Brownian motion and noise terms on the transmission of the epidemic is very high. If the noise is large the infection may decrease or vanish. For validation of our obtained scheme, the results for all the classes of the problem have been numerically simulated.

Keywords

Stochastic model
Time delay
Brownian motion
Stochastic stability
Numerical simulations

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