Process of Gene Therapy The progression of gene therapy remains complex. It needs many techniques for surplus developments. The considerable challenge is to develop successful gene therapy for any kind of particular conditions. In the body, specific cells requiring treatment must be accessible and recognized. To the cells the efficiently delivering working copies of genes must be available. Furthermore, strict genetic links with disease needs to be understood thoroughly Types of Gene Therapy: Gene therapy has 2 types: 1 Germ line gene therapy: Where by the introduction of functional genes, germ cells (egg or sperm) are modified which are incorporated into their genome. Therefore, we can say that changes due to therapy would be passed on to the later generation; it is heritable. Ideally, in counteracting genetic disease this approach should be highly effective and ethical reasons and hereditary diso technical difficulties m...