研究了免疫响应系统无病平衡点和正平衡点的全局稳定性问题。

The global stability of the disease-free equilibrium and the epidemic equilibrium in the immune-response system is studied.

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通过构造函数及根据不变集原理证明了无病平衡点和地方病平衡点的全局渐近稳定性；

Then the disease-free equilibrium point and endemic equilibrium point were proved with global asymptotic stability by constructing functions and basing on the invariant set principle.

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主要结论：当且仅当基本再生数小于等于时，系统存在唯一无病平衡点，且无病平衡点是全局渐近稳定。

The main conclusion drawn from this study is that: if and only if the basic productive number , the only disease-free equilibrium exists in the system and it is of global asymptotic stability.

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主要结论：当且仅当基本再生数小于等于时，系统存在唯一无病平衡点，且无病平衡点是全局渐近稳定。

The main conclusion drawn from this study is that: if and only if the basic productive number , the only disease-free equilibrium exists in the system and it is of global asymptotic stability.

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