STABILITY ANALYSIS AND SEMI-ANALYTIC SOLUTION TO A SEIR-SEI MALARIA
TRANSMISSION MODEL USING HE'S VARIATIONAL ITERATION METHOD
Abstract
We consider a SEIR-SEI Vector-host mathematical model of malaria
transmission described and built on 7-dimensional nonlinear ordinary
differential equations. We compute the basic reproduction number of the
model, examine the positivity and boundedness of the model compartments
in a region, verify the existence of the Disease-Free (DFE) and Endemic
(EDE) equilibrium points. Using the Gaussian elimination method and the
Routh-hurwitz criterion, we convey stability analyses at DFE and EDE
points which indicates that the DFE (malaria-free) and the EDE (epidemic
outbreak) point occurs when the basic reproduction number is less than
one and greater than one respectively. We obtain a solution to the model
using the Variational iteration method (VIM) (an unprecedented method)
and verify the efficiency, reliability and validity of the proposed
method by comparing the respective solutions via tables and combined
plots with the computer in-built Runge-kutta-Felhberg of fourth-fifths
order (RKF-45). We speculate that VIM is efficient to conduct analysis
on Malaria models and other epidemiological models.