When injected into humans, the agent itself or its protein subunits, will elicit a strong immune response, which will be protective against further infection from that agent.

当注入人体时，介质本身或其蛋白质亚基会引发很强的免疫反应从而避免对同种介质的进一步感染。

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Unfortunately, our results suggest that many pathogens and tumor cells also have integrated themselves into this protective system, thus enabling them to resist the human immune response.

不幸的是，我们的研究结果表明，许多病原体和肿瘤细胞也有这套综合保护性系统，从而使它们能够抵御人类的免疫反应“ 。

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The recent research demonstrated that the neutralizing antibodies played a very important role in the protective immune response.

近年来的研究结果表明，中和抗体在保护性免疫中起重要作用。

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More broadly, the principle upon which immunisation is based - namely, exposure to a non-harmful version of the naturally occurring infection in order to induce a natural and protective immune response - can be seen to be a far more natural process than the drug- and surgery-based therapies most widely venerated as the main achievements of modern medicine.

BBC: 'The natural benefits of vaccines'