Due to the different types of effects, bacterial and viral infections are also treated differently. Bacteria are tolerant to some antibiotics. Antibiotic agents target and kill the cell at various vital switch points. However, since antibiotics can not be directed to human cells virally infected host cells cannot be treated.There are antivirals for diseases caused by viruses. They need to fight the penetration and reproduction of viruses. The active ingredients also have a inhibiting effect on the ability of viruses to bind the host cells.