Viral infections can be tagged as infections caused by viruses while bacterial infections are infections caused by bacteria themselves.
It is believed that it is more difficult to treat viral infections than it is to treat bacterial infections because viruses are entirely very minute/small and they do not have the basics of life (to reproduce) on their own.
Viral infections are difficult to treat as these viruses are too small and they reproduce inside cells and not on their own. It hijacks a cell and uses it to create more of itself and to treat this would mean destroying the cells themselves alongside the viruses.
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