Epidemic Model with Additional Disease Death Rates
Han Litao¹, Li Weihua², Ma Zhi'en¹
(1. Xi'an Jiaotong University, Xi'an 710049, China£»2. Beihai Zhongcheng Parent Company for Industrial Exploiture)

Abstract: A nonautonomous S(susceptible)-I(infective)-S(susceptible) epidemic model is developed for two competitive species with additional disease death rates. Two possibilities prevail with both populations persistent or with one persistent and the other extinct.But it is impossible for both to be extinct.Moreover,the existence and global stability of the periodic solution of the system are also discussed when both populations coexist.
Keywords: epidemic model;additional disease death rate;global asymptotic stability