然而，这种病毒对幸存的兔子后代致命性更低，多年来造成的伤害也越来越小。
The virus was less deadly to the offspring of surviving rabbits, however, and it caused less and less harm over the years.
在一些研究中我们做过一个有趣的观察：乙肝病毒影响后代的性别比例。
There is a curious observation which we have made in several studies that the virus affects the gender ratio of offspring.
该病毒DNA通过尾巴注入宿主细胞，在这里指导后代噬菌体的产生。
The viral DNA is injected through the tail into the host cell, where it directs the production of progeny phages.
如果病毒像生物那样生长，它们将搜索被感染系统中的其他病毒，并与他们交换代码，然后繁殖全新的后代。
As the viruses grow more lifelike, they could search for other viruses in the infected system with which they can swap code and create new offspring.
他们在51位幸存者和他们的后代身上发现了一种目前为止无人发现的PRNP变体。PRNP是含有库鲁病传染源——朊病毒——一种蛋白质的源代码。
In 51 survivors and their descendants, they discovered a hitherto-unknown variant of PRNP, the gene which makes prions, the proteins that spread the disease.
从这个角度看，感冒时打喷嚏是因为，感冒病毒用你的身体繁衍后代。
From this point of view then, the reason why you sneeze when you have a cold is that your cold the cold virus is using your body as a tool to replicate itself.
尽管还无法确定病毒KoRV（考拉反转录病毒）是怎么传播的，但专家已经发现，这种病毒能够自我整合入动物的DNA，可随着基因遗传给后代，直接接触也会感染。
KoRV (koala retrovirus) integrates itself into the animalsâ DNA, and may be passed on genetically as well as through direct infection, experts have found, though they are unsure how it is spread.
尽管还无法确定病毒KoRV（考拉反转录病毒）是怎么传播的，但专家已经发现，这种病毒能够自我整合入动物的DNA，可随着基因遗传给后代，直接接触也会感染。
KoRV (koala retrovirus) integrates itself into the animalsâ DNA, and may be passed on genetically as well as through direct infection, experts have found, though they are unsure how it is spread.
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