What do a virus and a living cell have in common?

Viruses cannot reproduce. They use a living cell to replicate themselves. When a virus infects a living cell, it injects its genetic material (DNA or RNA) into the cell. The virus' genetic material takes control of the cell and turns it into a virus factory. The cell does nothing but manufacture and assemble virus parts until eventually the cell ruptures and the new viruses erupt and go on to infect more cells.