Abstract
In this article, a SIRS epidemic model with a general incidence rate is proposed and investigated. We briefly verify the global existence of a unique positive solution for the proposed system. Moreover, and unlike other works, we were able to find the stochastic threshold \(\mathcal {R}_s\) of the proposed model which was used for the discussion of the persistence in mean and extinction of the disease. Moreover, we utilize stochastic Lyapunov functions to show under sufficient conditions the existence and uniqueness of stationary distributions of the solution. Lastly, numerical simulation is executed to conform our analytical results.
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Acknowledgements
The authors are very grateful to the Editor and the Reviewers for their helpful and constructive comments and suggestions. The authors are also thankful to the the Faculty of sciences, Ibn Tofail University, Kenitra and the laboratory MFA (Mathématiques Fondamentales et Applications) Faculty of sciences, Chouaib Doukkali University, El Jadida for their help and support.
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This work is Funded by Ministerio de Ciencia e Innovación (Spain) and FEDER (European Community) under grant PID2021-122991NB-C21.
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Communicated by Rosihan M. Ali.
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Lakhal, M., Guendouz, T.E., Taki, R. et al. The Threshold of a Stochastic SIRS Epidemic Model with a General Incidence. Bull. Malays. Math. Sci. Soc. 47, 100 (2024). https://doi.org/10.1007/s40840-024-01696-2
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DOI: https://doi.org/10.1007/s40840-024-01696-2
Keywords
- Epidemic model
- Stochastic SIRS epidemic model
- General rate incidence
- Stochastic threshold
- Stationary distribution