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How could all your Helper T-Cells have weapons against every possible enemy?

I tried to google it but found no good answer.

Here is the source: https://www.youtube.com/watch?v=lXfEK8G8CUI&t=362s

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  • $\begingroup$ Welcome to Biology.SE. The Biology.SE community has agreed that questions that show little or no prior research effort are off-topic on this site as are "homework" questions unless you have shown your attempt at an answer. Please edit your question and tell us where you've looked for answers, what you do know about the topic, and where exactly you still have questions. In particular, that claim seems dubious — I encourage you to check out KhanAcademy for relatively reliable introductory content. $\endgroup$
    – tyersome
    Sep 27 at 15:17
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    $\begingroup$ The video is wrong where it claims that each helper T-cell has weapons against every possible enemy. The so-called "adaptive immune system" is complex, but basically it generates billions of cells, each with a semi-random weapon. The better a weapon matches the enemy, the more that cell divides to produce its weapons and refine them to match even better. Check out the Khan Academy here: khanacademy.org/science/in-in-class-12-biology-india/… $\endgroup$
    – Armand
    Sep 28 at 3:15

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