Gene therapy involves correction of the gene defects in child or embryo.
Adenosine deaminase deficiency is a kind of immuno-disorder caused by deletion of gene coding for ADA.
It can be cured by bone marrow transplantation or enzyme replacement therapy.
A functional ADA-cDNA(through Retrovirus) is introduced in lymphocyte culture for genetic infusion and transfered to the patient body for normal functioning.