The latent and immunity period of inflection can be reflected by the infection model with delay, and more studies pay attention to them.
具有时滞的传染病模型能较好反映传染病的潜伏期、免疫期等问题，对其研究越来越受到重视。
In this paper, the existence of infinite period bifurcation of a nonlinear communicable disease model with temporary immunity (SIRS) is studied, and we give global bifurcation of the system.
本文讨论了一个具有暂时免疫的非线性SIRS传染病模型的无限周期分枝的存在性，从而给出了该系统的整体分枝。
The simulation results show that the latent period of Internet worms and the immunity measure intensity are important factors to influence Internet worm propagation procedure.
模拟结果表明网络蠕虫潜伏期与免疫措施强度是影响网络蠕虫传播过程的重要因素。
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