In this paper, the conformable fractional-order SIR epidemic model are solved by means of an analytic technique for nonlinear problems, namely, fractional differential transformation method (CFDTM) and variational iteration (VIM). These models system equation (CFDE) that has no solution. The VIM is based on derivative proved. result revealed both methods in agreement accurate efficient solving ...

Taking into account the depletion of food supply by all individuals, and fact that chronic infectious diseases will not cause infected individuals to lose their fertility completely, we first propose a new SIR epidemic model ODE. For this model, derive its basic reproduction number $ \mathcal{R}_0 $, show disease-free equilibrium point is globally asymptotically stable when \mathcal{R}_0\le1 wh...

in this paper, a five–dimensional mathematical model is proposed for the transmission dynamics of hiv/aids within a population of varying size. in writing the model, we have divided the population under consideration into five sub classes of susceptible, infective, pre-aids, aids related complex and that of aids patients. the model has two non- negative equilibria namely, a disease free and the...

The SIR epidemic model for disease dynamics considers recovered individuals to be permanently immune, while the SIS epidemic model considers recovered individuals to be immediately resusceptible. We study the case of temporary immunity in an SIR-based model with delayed coupling between the susceptible and removed classes, which results in a coupled set of delay differential equations. We find ...