Antibiotics are drugs that kill or stop the growth of bacteria. They do not work against viruses, so they are useless for colds or influenza. Taking an antibiotic when it is not needed, or stopping a course too early, gives surviving bacteria the chance to become resistant. Resistant bacteria can pass their resistance to others, which makes later infections harder to treat. Doctors therefore prescribe antibiotics only when a bacterial infection is likely, and they advise patients to finish the course as directed.

Answer and explanation

Correct answer: B. Use antibiotics only for likely bacterial infections

  1. Step 1: Doctors prescribe antibiotics only when a bacterial infection is likely. Answer: Use antibiotics only for likely bacterial infections. Why not the others: The other statements contradict the text.

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