垂直地以及水平地播送的疾病的一个组织年龄的 SEIR 流行模型被调查。地方性的状态的存在的阀值结果为大多数案例被建立。在某些条件下面,唯一也被显示出。使用的阀值以模型的人口统计、流行病学的参数是明确地可计算出来的。
An age-structured SEIR epidemic model of a vertically as well as horizontally transmitted disease is investigated. Threshold results for the existence of endemic states are established for most cases. Under certain conditions, uniqueness is also shown. Threshold used are explicitly computable in term of demographic and epiderniological parameters of the model.