给出一个带有接种疫苗的SIS流行病模型,并对它进行了分析,得出该模型有3个稳定点,其中1个无病平衡点及2个染病平衡点.
An SIS epidemic model with vaccination and temporary immunity is studied. The analyzing result shows that the model has three equilibria, where one is the disease-free equilibrium and two are epidemic equilibrium.