Why are antibiotics ineffective against influenza?

Answer and explanation

Correct answer: D. Antibiotics act on bacteria, not on viruses

Antibiotics target bacterial structures and processes; viruses reproduce inside host cells.
Answer: Antibiotics act on bacteria, not on viruses.
Why not the others: Influenza is caused by a fungus: it is caused by a virus. Viruses are too large: viruses are much smaller than bacteria. Antibiotics cannot enter the blood: they can.

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