In research facilities all around the world scientist are attempting to stop diseases at their very roots. Instead of trying to find drugs to cure illnesses they are trying to change the genes that cause the diseases. The process by which this is done is called gene therapy. Gene therapy is the deliberate alteration of the human genome for alleviation of disease. The studies of gene therapy began in the mid 1980's to early 1990's. The focus then was "treating diseases caused by such single-gene defects as hemophilia, Duchene's muscular dy ....