Gene Therapy is the altering the genotype of a tissue or organ

In early stages treatments hope to include:

- GM white blood cells that produce proteins that kill cancer cells

- targeting genes at cancer cells to kill them or revert them back to normal cells

- white blood cells that would not reproduce if infected with HIV

- germ-line modification (only present in animals) which is currently illegal

- at present, only somatic cell therapy is legal which alters only specific cells in the body