Steady states of populations Where all populations ds*dI*dR* =0 have stabilized People still move between d states,but the net number =I.S-R产-入Mr=0 of people does not change S*depends on rate at which people exit the 0=I[BS*-入R-入4] infected population 0=BS*-入R-入d山 and infectivity of disease Does not depend on price 入R+入d B Bhattacharya,Hyde and Tu-HealthEconomicsBhattacharya, Hyde and Tu – Health Economics Steady states of populations  Where all populations have stabilized  People still move between states, but the net number of people does not change  S* depends on rate at which people exit the infected population and infectivity of disease  Does not depend on price