Modenna is the company that is leading these treatments. Some treatments were made hoping to cure "incurable" diseases. These treatments take outside mRNA and they have to figure out how to make a persons body accept it to make new protein molecules that were destroyed by the disease. Your body notices the foreign/outside DNA as viruses and turns them down. This I think is going to be the biggest challenge. They will have to figure out what the body will accept because every ones DNA is different so you can't make one "key" that's will fit all. this process will take many years and will have to be tested on people and then watch the effects of the people.