These trials will give a better idea of the number of doses required for a person to be immunized, as well as of the quantity on active principle (antigen) needed in each vaccine dose.

通过这些试验，将能够更好地了解一个人需要多少剂疫苗才能获得免疫，以及每剂疫苗中必须含有多少有效成分(抗原)。

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If a helper cell recognises an antigen, it becomes activated.

如果某一个助细胞识别出一个抗原，该助细胞就会被活化。

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Some pandemic vaccines contain an adjuvant to reduce the amount of virus antigen to be used (an antigen is a substance capable of stimulating an immune response).

有些大流行性流感疫苗含有佐剂以便减少病毒抗原的使用量(抗原是能够刺激免疫反应的一种物质)。

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They just wait, they wait for their time, they wait until you are in danger from a particular antigen.

它们时刻准备着,在等待着那一刻,等待你被某种特别的抗原威胁的时刻

耶鲁公开课 - 生物医学工程探索课程节选

So, the antigen we're thinking about is a vaccine particularly designed to elicit immune response against a pathogen.

我们现在考虑的这种抗原,是一种特别设计的疫苗,它能够诱发免疫效应以消灭病原体

耶鲁公开课 - 生物医学工程探索课程节选

So, I have a bacteria infection, stimulates my immune system, I start making antibodies that bind to an antigen specific to that bacteria.

所以 如果我被细菌感染了,我的免疫系统被激活,开始制造抗体,这些抗体结合到细菌特异性的抗原上

耶鲁公开课 - 生物医学工程探索课程节选

So it ought to be possible to test for the presence of a certain antigen on a surface by dragging a suitable antibody over it, and seeing if it gets stuck going fishing, in effect, on a molecular scale.

ECONOMIST: Microscopy

Out of tens of thousands of proteins in a cancer cell, less than one in a thousand may become a cancer antigen.

FORBES: In search of antigens

The vaccine was created by taking a glycoprotein antigen from the rabies virus and inserting it into Vaccinia virus, the same one used for smallpox inoculation.

FORBES: A Pox On Your House? How Fighting One Disease Brought Back Another