研究报告的作者认为二手烟可能影响免疫系统。这使得出生不久的婴儿、刚学会走路的婴儿及低龄儿童更容易受各类传染病的影响。

The study authors speculate that secondhand smoke may affect the immune system, making infants, toddlers and young children more susceptible to infections of all kinds.

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研究了两类不同免疫方式下具有饱和传染力的SIR流行病模型的动力学行为。

The dynamic behaviors of a kind of SIR epidemic model with two different vaccination strategies and saturation infectious force are researched.

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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。

The latent and immunity period of inflection can be reflected by the infection model with delay, and more studies pay attention to them.

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