淋巴球：对免疫系统至为重要的一型白血球，其调节并参与获得免疫力的过程。

Lymphocyte: Type of leukocyte fundamental to the immune system, regulating and participating in acquired immunity.

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我们还可以确定的是，一旦大部分人群感染猪流感并获得免疫力，疾病的变种将会打破目前的免疫性并成为当下的压力。

We can also say that once most people have been infected by swine flu and become immune, a variant that can beat that immunity will replace the current strain.

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在各个国家中，免疫反应范围和时效变化很大。无论是用何种疫苗，获得免疫性的儿童所占比率变化同样很大。获得出示免疫力的儿童的平均年龄是1.1月。

Immunization coverage and timing varied widely by country, as did the proportion of children immunized and with what vaccines. The mean age at first immunization was 1.1 months.

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So, what that really means, you know, from last week's lecture, is that the vaccine stimulates these particular cells in your immune system to give you immunity.

所以,这就意味着,通过上周的课程,你们知道,疫苗通过刺激免疫系统中的,特定细胞来使人获得免疫力

耶鲁公开课 - 生物医学工程探索课程节选