what do all viruses have in common
Split and merge into it. Answer by Waitey2k10. Confidence votes 24. They do reproduce but a virus can't reproduce outside of a host cell. so the only thing in common really is that the virus needs a cell to reproduce.The only real similarity between viruses and living cells are that they both have some sort of genetic material.Cells have DNA and viruses have either RNA or DNA.plit and merge into it. Answer by Waitey2k10. Confidence votes 24. They do reproduce but a virus can't reproduce outside of a host cell. so the only thing in common really is that the virus needs a cell to reproduce.