Lymphatic System

Specific Defenses

Why is it difficult to treat viral infections with medications?

Antibiotics are ineffective against viral infections because viruses lack the structures (e.g., a cell wall) with which antibiotics can interfere. In general, it is difficult to treat viral infections with medications without affecting the host cell, as viruses use the host cell’s machinery during replication. Several antiviral drugs have been developed that are effective against certain viruses.


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