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Successive Vaccination and Difference in Immunity of a Delay SIR Model with a General Incidence Rate

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  • Yongzhen Pei
  • Li Changguo
  • Qianyong Wu
  • Yunfei Lv

Abstract

A delay SIR epidemic model with difference in immunity and successive vaccination is proposed to understand their effects on the disease spread. From theorems, it is obtained that the basic reproduction number governs the dynamic behavior of the system. The existence and stability of the possible equilibria are examined in terms of a certain threshold condition about the basic reproduction number. By use of new computational techniques for delay differential equations, we prove that the system is permanent. Our results indicate that the recovery rate and the vaccination rate are two factors for the dynamic behavior of the system. Numerical simulations are carried out to investigate the influence of the key parameters on the spread of the disease, to support the analytical conclusion, and to illustrate possible behavioral scenarios of the model.

Suggested Citation

  • Yongzhen Pei & Li Changguo & Qianyong Wu & Yunfei Lv, 2014. "Successive Vaccination and Difference in Immunity of a Delay SIR Model with a General Incidence Rate," Abstract and Applied Analysis, Hindawi, vol. 2014, pages 1-10, June.
    • Handle: RePEc:hin:jnlaaa:678723
    DOI: 10.1155/2014/678723
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