Compared to antibiotics, there are fewer antiviral agents available because ________.
A. viruses are not as deadly as bacteria so research dollars have been spent developing antibacterial drugs
B. before drugs were developed that could directly target virus-specific enzymes, it was thought that any antiviral agent would have to target host cell processes, ultimately damaging cells and tissues
C. they are much more costly to produce due to the small size of viruses compared to bacteria
D. antibiotics are produced by other bacteria, whereas all antivirals have to be synthesized in a laboratory
Answer: B
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