Delivery or Take out?

So with something called "Gene Therapy" what sort of medium will it be delivered in and by what mechanism??

Same for "stem cells" ??

These are just classes of possible therapies and say nothing about the delivery.

Personally I think a solution has to be "take out" or pill equivalent and cannot practically use holes in the head or pumps in the chest.

One large hole in my head already ,,, ken