Gene therapy is a gene or gene product that can be selectively delivered to a specific cell/tissue with minimal toxicity. Gene therapy is 'the use of genes as medicine. It involves the transfer of a therapeutic or working gene copy into specific cells of an individual in order to repair a faulty gene copy. Thus it may be used to replace a faulty gene, or to introduce a new gene whose function is to cure or to favorably modify the clinical course of a condition. The scope of this new approach to the treatment of a condition is broad, with potential in the treatment of many genetic conditions,...