They can't always neutralize viruses because the viruses are predominantly inside cells.

抗体不是总能中和病毒,因为病毒主要在细胞中

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How is your immune system going to recognize that this virus is there causing bad results if it's living inside of a cell and doing all its business inside a cell where antibodies can't get to it?

你的免疫系统怎样才能识别,作恶多端的病毒呢,如果它隐藏在细胞中进行繁殖,而抗体又无法进入细胞,那该怎么办

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They know that these cells are harboring the virus because those cells have foreign antigens on their MHC1.

它们能知道哪些细胞窝藏病毒,因为这些细胞的MHC1上有外源抗体

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So, either stimulates the production of-- and differentiation of B-cells, to produce a specific antibody that can neutralize the virus, or stimulates the production of cytotoxic T-cells that can kill infected cells within your body.

所以,疫苗的刺激要么能够,促进B淋巴细胞产生和分化,以生成特定的抗体来杀灭病毒,要么刺激T细胞释放细胞毒素,杀死身体里被感染的细胞

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