这些慢病毒非常不同，以至于猫类不会感染HIV而人类不会感染FIV，但是他们基础的生物化学属性是相同的。
The viruses, known as lentiviruses, are different enough that cats can't catch HIV and people can't get FIV, but most of their basic biochemistry is the same.
一份最近发表在＜自然生物化学＞杂志上的美国的新的关于流感病毒的研究报告清楚地说明了为何冬季是流感季节。
A new US study on the Influenza viruses, published recently in the journal Nature Chemical Biology, has shed light on why winter is the flu season.
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