What was once thought to be a closed field of research and growth has now become one of the largest areas of research and development for gene therapies. The idea is simple. We have had the human genome mapped out for over a decade and have been discovering more and more about what it means and how different diseases and problems are linked to our genetic code. With constantly improving technology we have been learning how to find and target improper sequences in living DNA and to replace it with the proper arrangement. Taking harmless viruses, researches are able to modify and tag them so that they can seek out and replace sequences of the genome to an extremely precise level. Between both viral and non-viral vector systems, R.M.C.E., genome methylation screening and more the potential is out there. These sorts of therapies have the capacity to one day treat things as small as a receding hairline to more serious problems such as cancer therapy, cardiovascular diseases and even curing STD's. I believe that more complicated viral vector therapies amongst other gene therapies hold our cure to many of the medical problems that we face today.