The development of antiviral drug therapy is difficult because

A. viruses are obligate intracellular parasites so the host cell can be harmed by the drug.
B. viruses do not have specific replication cycles that can be targeted.
C. viruses do not contain genetic material.
D. their life cycles do not have distinctive stages.


Answer: A. viruses are obligate intracellular parasites so the host cell can be harmed by the drug.

Biology & Microbiology

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