<human>:  What is the difference between a virus and a bacteria?
<bot>: The main difference between a virus and a bacteria is that viruses are not living organisms, while bacteria are. Viruses are composed of genetic material, typically DNA or RNA, surrounded by a protein coat, while bacteria have a cell wall, which encloses the cell membrane and the genetic material. Bacteria can also reproduce on their own, while viruses must use the host cell's machinery in order to reproduce. Bacteria can be destroyed with antibiotics, while viruses cannot.