Why doesn't anibodies work on viruses?

Answer 1

Actually, antibodies do work on viruses, if they are the right ones.

The question you probably are trying to ask is 'why don't antibiotics work on viruses ? '

The reason is that antibiotics work on bacteria by interfering with some part of the bacterium's metabolic machinery. A good and simple example is penicillin, which prevents many bacteria from building a cell wall.

Tricks like this don't work on viruses because they don't have any metabolic machinery. They are almost naked DNA. This hijacks the metabolic machinery of the cells that they invade; the cell is tricked into making many copies of the virus until the cell bursts open and a flood of new viruses looks for new cells to invade.