传染病动力学模型的分析与研究是当今的热点问题之一，随着SARS、艾滋等传染病的相继爆发，人类正面临着传染病长期而严峻的威胁。因此，对传染病发病机理、传染规律和防治策略研究的重要性日益突出，且已成为当今世界需要迫切解决的重要问题。

It becomes one of the hot issues to analyse and study the infectious disease dynamic model.As the infectious diseases such as SARS and AIDS broke out,the human beings are confronted with the long-term and serious threat of the infectious diseases.Thus,it gets more and more important to study the pathogenesis, infection laws, and prevention and cure strategy of the infectious diseases.Also,it becomes an import problem for which an immediate solution is wanted in the current world.