Analysis on the Stability for a Class of SARS Epidemic Model

By partitioning population into six compartmemts and considering the density constraint of susceptible population and the cure and death rate of patients,a new and extended dynamic model for SARS epidemic is established based on the present model.It is shown that the infection-free equilibrium is globally asymptotically stable and the endemic equilibrium is not asymptotically stable under certain conditions.It comes to the conclusion that the epidemic system is permanent under appropriate conditions.