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How does the immune system fight an infection?

Answer:
If you've been vaccinated against the infection, eg. Tetanus, or flu vaccine, etc, you have what's called "acquired immunity". This means that when you were vaccinated with what is actaully a weaker version of the bacteria, your B-cells recognize them and produce antibodies, your T-cells then attacking and killing the antigens. Meaning that the next time your body is attacked, the B-cells will immediately recognize them and know how to respond because of it's memory.
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First answer by ID1021330359. Last edit by ID1021330359. Question popularity: 3 [recommend question].

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