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
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
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
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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