Abstract
This paper delves into the study of a diffusive SIR epidemic model characterized by reaction–diffusion equations enriched with a fractional derivative within the Caputo framework. Within this model, we incorporate a general incidence function and meticulously analyze how the adoption of mask-wearing and adherence to physical distancing protocols intricately shape the dynamics of susceptible and infected individuals. Our exploration commences by establishing the existence and uniqueness of a positively bounded solution for the model, employing powerful Banach’s fixed point theorem. Moreover, we showcase that this solution demonstrates distinctive global mild attributes. Subsequently, we elucidate the two equilibrium points inherent in the system: the disease-free and endemic points. Employing the LaSalle–Lyapunov theorem, we establish that the global stability of these equilibrium points is predominantly contingent upon the basic reproduction number of the system. This stability assertion holds true across various values of the non-integer order derivative. Lastly, we substantiate our findings with a series of numerical simulations that provide tangible support for the preceding analytical results.
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Bouissa, A., Tahiri, M., Tsouli, N. et al. Global dynamics of a time-fractional spatio-temporal SIR model with a generalized incidence rate. J. Appl. Math. Comput. 69, 4779–4804 (2023). https://doi.org/10.1007/s12190-023-01932-1
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DOI: https://doi.org/10.1007/s12190-023-01932-1