A generalized version of fractional models is introduced for the COVID-19 pandemic,
including the effects of isolation and quarantine. First, the general structure of fractional …

In this paper, we apply optimal control theory to a novel coronavirus (COVID-19)
transmission model given by a system of non-linear ordinary differential equations. Optimal …

This article investigates a family of approximate solutions for the fractional model (in the
Liouville-Caputo sense) of the Ebola virus via an accurate numerical procedure (Chebyshev …

In this paper, a general formulation for the SIRV epidemiological model is presented as a
system of fractional order derivatives with respect to time to characterize some infectious …

We investigate, through a fractional mathematical model, the effects of physical distance on
the SARS-CoV-2 virus transmission. Two controls are considered in our model for …

In this work we present three new models of the fractal-fractional Ebola virus. We investigate
the numerical solutions of the fractal-fractional Ebola virus in the sense of three different …

A human respiratory syncytial virus surveillance system was implemented in Florida in 1999,
to support clinical decision-making for prophylaxis of premature newborns. Recently, a local …

Corona virus disease which has caused frustration in the human community remains the
concern of the globe as every government struggles to defeat the pandemic. In this …

In this manuscript, a new nonlinear model for the rapidly spreading Corona virus disease
(COVID-19) is developed. We incorporate an additional class of vaccinated humans which …

The objective of this paper is to investigate the existence of mild solutions and optimal
controls for a class of fractional neutral stochastic differential equations (NSDEs) driven by …