They can reproduce and so you only need to give a few of them in order to make many, many inside the body.

它们能自我复制,所以只需少量病毒,就能在体内产生大量的病毒

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These released particles can now go on and infect neighboring cells, they can travel in the bloodstream to infect cells at a distance and the virus spreads throughout a multicellular host.

这些释放出的病毒颗粒,可以继续感染邻近的细胞,它们可以随着血流去感染远距离的细胞,于是病毒可以在多细胞宿主体内全面扩散

耶鲁公开课 - 生物医学工程探索课程节选

They take it, the vaccine itself, the virus, reproduces in their gut and they can actually spread it to other children in the same way that they spread the disease where you've got children that are maybe at school or at childcare.

他们服用了疫苗,则疫苗菌本体,病毒本体便在他们的体内进行繁殖,实际它们以同样方法传播到其他孩子体内,当你去学校或者幼儿园,接你的孩子的时候,这些病毒正在传播

耶鲁公开课 - 生物医学工程探索课程节选

Or you get a cold, the cold virus takes hold, the viruses start replicating inside of you and it takes some time for immune system to gear up to eliminate it, so we're used to thinking about responses that take some time.

或者你得了感冒,感冒病毒扎根在你的身体中,病毒开始在你体内复制,免疫系统需要一定时间做好准备去消灭它,所以我们曾认为免疫反应需要一定时间

耶鲁公开课 - 生物医学工程探索课程节选

That gets presented in the context of MHC1 on cells within your body.

在体内,病毒同MHC1共同呈递

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