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通过假设被传染的易感者一部分经过一段潜伏期后才具有传染性,而另一部分被感染的易感者直接成为传染者,建立了一类带有非线性传染率的SEIR传染病模型,得到了确定疾病是否成为地方病的基本再生数以及无病平衡点和地方病平衡点的全局稳定性.
By assuming that some of the infected susceptible individuals become contagious after a lapse of incubation period and another part of the infected susceptible individuals become directly infected, a class of SEIR epidemic models with non-linear infection rates are established and obtained Determine whether the disease becomes a basic reproduction of endemic diseases and the global stability of disease-free and endemic diseases.