HIV and Varicella-Zoster co-infection has been threatens the lives and livelihood of millions
of individuals all over the world. In various nations of the world the co-infection disease is …

This study presents a fractional mathematical model based on nonlinear Partial Differential
Equations (PDEs) of fractional variable-order derivatives for the host populations …

Objectives: In the context of COVID-19, patients with a severe or critical illness may be more
susceptible to developing secondary bacterial infections. This study aims to investigate the …

In this research, we studied a mathematical model formulated with six fractional differential
equations to characterize a COVID-19 outbreak. For the past two years, the disease …

Tumors result from genetic mutations or environmental factors that prompt cells to divide
uncontrollably. This study aims to examine the behavior of tumor-immune cell growth in the …

The motive of the current work is related to solving the coronavirus‐based mathematical
system of susceptible (S), exposed (E), infected (I), recovered (R), overall population (N) …

In this paper, a four-dimensional competition model, driven by the Riesz–Caputo operator, is
established. Then, the presented model's uniqueness, existence, and stability are …

The emergence of a coronavirus disease (COVID-19) pandemic caused by severe acute
respiratory syndrome coronavirus (SARS-COV 2) has caused an unprecedented global …

This paper introduces stochastic disturbances into a semi-parametric SEIR model with
infectivity in an incubation period. The model combines the randomness of disease …

In this article, a fractional-order model for the COVID-19 scenario in India is formulated using
nine different compartments in the Caputo sense. The fractional-order model mainly focuses …