Abstract
A new SIRS epidemic model with infection age and relapse on a scale-free network is introduced. The basic reproduction number R0 is defined. Asymptotic smoothness of solution and uniform persistence of system are proved. It is shown that the disease-free equilibrium is globally asymptotically stable by using Fluctuation Lemma if R0 < 1 and the endemic equilibrium is globally asymptotically stable by constructing suitable Lyapunov functional if R0 > 1. Effects of two immunization schemes are studied. Numerical simulations and sensitivity analysis are performed. Results manifest that infection age and degree of node play a significant role in controlling the emergence and spread of the epidemic disease.
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