Using Non-Standard Finite Difference Scheme to Study Classical and Fractional Order SEIVR Model

In this study, we considered a model for novel COVID-19 consisting on five classes, namely S, susceptible; E, exposed; I, infected; V, vaccinated; and R, recovered. We derived the expression basic reproductive rate R0 studied disease-free endemic equilibrium as well local global stability. addition, extended nonstandard finite difference scheme to simulate our using some real data. Moreover, keeping in mind importance of fractional order derivatives, also attempted extend numerical results model. regard, proposed under concept derivative Caputo concept. simulated results. compared with traditional RK4 both CPU time graphically. Our have close resemblance those method. Also, case infected class,