Table 1.

Gene therapy clinical trials based on study classification as of 2017 (Ginn et al., 2017).

Classification	Number of trials	Percentage (%)
Cancer diseases	1688	65
Monogenic diseases	287	11.1
Infectious diseases	182	7
Cardiovascular diseases	180	6.9
Other diseases	58	2.2
Healthy volunteers	56	2.2
Gene marking	50	1.9
Neurological diseases	47	1.8
Ocular diseases	34	1.3
Inflammatory diseases	15	0.6