The first human gene therapy trial began in 1990 and treated two patients with Severe Combined Immune Disorder (SCID) caused by ADA deficiency.
In a 1996 survey, 68% of Americans approved of germline and somatic gene therapy.
In the same survey, 83% of physicians supported use of germline gene therapy to eradicate diseases.
Worldwide there are 396 gene therapy protocols involving 3278 patients (Sept. 1999).
75% of all gene therapy trials take place in the United States.
63% of all approved gene therapy protocols are for trials for treating cancer.
40% of Americans think it would be okay to use gene therapy to make their children more attractive or intelligent.
Primary limitation in gene therapy: efficient gene delivery to body.