in this paper, we establish a kind of new class age-structure seir epidemic model with impulsive vaccination and nonlinear infectivity, which contains odes and pdes at the same time.
建立了一类新的带有脉沖接种的类年龄结构seir流行病模型,并考虑其具有非线性传染率。
in the second section, considering the permanent immunity factor, the seir epidemic model with infectious force in the latent period which makes the model more universal is investigated.