David's disease condition was something which affected the immune system directly due to change occured in the X Chromosome of his gene.It affects the lymphocytes namely T cells and B cells which protects an individual from infection.Even a mild infection can be fatal in SCID.There were two option during his period a stem cell therapy which was found to be a cure but no match was found for him and the other being bubble therapy to prevent infection Even if David was born a week later and suffers SCID, he will be in need of bubble therapy to survive.
C. On September 21, 1971, an infant was born with severe combined immunodeficiency dis- ease (SCID)....