Since its first successful use nearly 30 years ago, gene therapy has grown into an important if experimental part of the medical sector. Now it is taking off in a big way, offering treatment for chronic ailments such as diabetes and other conditions. PreveCeutical Medical, Inc. (CSE: PREV) (OTCQB: PRVCF) is at the forefront of this segment of healthcare, seeking preventive gene treatments to tackle Type 2 diabetes. MannKind Corp. (NASDAQ: MNKD) is offering other innovations for diabetics, with the first inhalation-based drug for managing insulin levels, and Danish multinational Novo Nordisk (NYSE: NVO) offers support for tackling diabetes, with 85% of its business in this area. The potential of gene therapy is being proved with other ailments, for example the work of Sangamo Therapeutics, Inc. (NASDAQ: SGMO) on hemophilia, Huntington’s disease, and HIV. Even obscure diseases are becoming treatable through gene therapy thanks to Audentes Therapeutics, Inc. (NASDAQ: BOLD), whose virally carried treatments tackle Criger-Najjar syndrome and Pompe disease.