A fractional-order model for CoViD-19 dynamics with reinfection and the importance of quarantine

Coronavirus disease 2019 (CoViD-19) is an infectious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Among many symptoms, cough, fever and tiredness are the most common. People over 60 years old and with associated comorbidities are most likely to develop a worsening health condition. This paper proposes a non-integer order model to describe the dynamics of CoViD-19 in a standard population. The model incorporates the reinfection rate in the individuals recovered from the disease. Numerical simulations are performed for different values of the order of the fractional derivative and of reinfection rate. The results are discussed from a biological point of view. (c) 2021 Elsevier Ltd. All rights reserved.

Automated summary

This paper proposes a non-integer order model to describe the dynamics of CoViD-19 in a standard population, incorporating reinfection rates in recovered individuals. Numerical simulations are performed to study the impact of different values of fractional derivatives and reinfections rates on the disease dynamics, with results discussed from a biological perspective.