Analysis of SVEIL Model of Tuberculosis Disease Spread with Imperfect Vaccination

Authors

  • Handika Lintang Saputra Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Brawijaya, Malang
  • Isnani Darti Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Brawijaya, Malang
  • Agus Suryanto Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Brawijaya, Malang

DOI:

https://doi.org/10.31764/jtam.v7i1.11033

Keywords:

Center manifold theorem, Effective reproduction number, Imperfect vaccination, Tuberculosis.

Abstract

This study proposes a SVEIL model of tuberculosis disease spread with imperfect vaccination. Susceptible individuals can receive imperfect vaccination, but over the time the vaccine efficacy will decrease. Vaccinated individuals are in vulnerable class since they still have probability to get reinfected. The proposed model includes treatment for both high-risk latent and active TB patients. In fact, after getting appropriate treatment (get recovered) the individuals still have bacteria in their body and it is classified to low-risk laten class. Dynamical behaviour of the model is analyzed to understand the local stability equilibrium. The Routh-Hurwitz criterion is used to analyze the local stability equilibrium in disease free equilibrium (DFE) point and Center Manifold theorem is used to prove the local stability of the endemic equilibrium (EE) point. The local stability equilibrium state totally depends on the effective reproduction number R_v. If R_v<1 , then the DFE point is locally asymtotically stable, while if R_v>1 the EE point is locally asymptotically stable . The parameter used in this paper is based on the previous researches related to TB and the initial subpopulations are assumed. Numerical simulations show that the disease transmission rate affect the effective reproduction number, therefore it influences the stability of equilibrium points..

 

Author Biography

Handika Lintang Saputra, Department of Mathematics, Faculty of Mathematics and Natural Sciences, University of Brawijaya, Malang

Mathematics and Natural Science Faculty

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Published

2023-01-12

Issue

Vol. 7 No. 1 (2023): January

Section

Articles

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