"-- Scientists for the first time have engineered a harmless virus to correct, rather than replace, the genetic defect causing the most common single gene disorder. The new research presents a novel approach to gene therapy in treating the most common inherited anemias: the thalassemias. "

See, this is what I am talking about. Using genetically engineered viruses to re-program your genome!

ScienceDaily Magazine -- Researchers Engineer Virus That Blocks Common Genetic Defect