Question

why it is difficult to make an antiviral drugs ?

Answer 1

because viruses use the host cell to replicate.This makes it difficult to find target for the drug that would interfere with the virus without harming the host organism's cell

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Answer 2

Designing safe and effective antiviral drugs is difficult, because viruses use the host's cells to replicate. This makes it difficult to find targets for the drug that would interfere with the virus without also harming the host organism's cells.