What are antibiotics? Why are they both good and bad?
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Antibiotics kill bacteria. But there are two caveats:
* They only kill all the unwanted bacteria if prescribed and used properly (i.e. the correct drug and correct course length). If used improperly, some of the bacteria will survive, and they’ll evolve resistance to this antibiotic (so you have to switch to a stronger one, and if someone gets infected with these bacteria from you, the antibiotic you used will be of no effect).
* They also kill the bacteria you actually want in your body, e.g. your gut flora.
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