The first clinical gene therapy was done for the treatment of
| 1. | AIDS |
| 2. | Cancer |
| 3. | Cystic fibrosis |
| 4. | SCID (Severe Combined Immuno Deficiency resulting from the deficiency of ADA |
The SCID patient has a defective gene for the enzyme Adenosine Deaminase (ADA) due to which he/she lacks functional T-lymphocytes and therefore, fails to fight the infecting pathogen.
