Seir epidemic model with delay
Seir epidemic model with delay
复制标题
具有延迟的 SEIR 流行病模型
DOI：
10.1017/s144618110000345x
复制
发表时间：
2006-07-01
期刊：
影响因子：
0.9
通讯作者：
Liu, Shengqiang
中科院分区：
文献类型：
--
作者：
Yan, Ping;Liu, Shengqiang
A disease transmission model of SEIR type with exponential demographic structure is formulated, with a natural death rate constant and an excess death rate constant for infective individuals. The latent period is assumed to be constant, and the force of the infection is assumed to be of the standard form, namely, proportional to I .t/=N .t/ where N .t/ is the total (variable) population size and I .t/ is the size of the infective population. The infected individuals are assumed not to be able to give birth and when an individual is removed from the I -class, it recovers, acquiring permanent immunity with probability f .0 ≤ f ≤ 1/ and dies from the disease with probability 1 − f . The global attractiveness of the disease-free equilibrium, existence of the endemic equilibrium as well as the permanence criteria are investigated. Further, it is shown that for the special case of the model with zero latent period, R0 > 1 leads to the global stability of the endemic equilibrium, which completely answers the conjecture proposed by Diekmann and Heesterbeek.
