What could happen if people take antibiotics when they do not need them? Support your answer with evidence from the text.

Not gonna write an essay here nor do I have access to your text. But:

Taking antibiotics with a broad spectrum range kills the normal flora found in your body. This puts you at a greater risk for infection.

Also, misusing antibiotics when we have no specific target to kill (like Staph. Aureus) is what has lead to increased genetic restance of antibiotics by microorganisms.