They don't use ingredients, they are not making a cake. They modify, on a genetic level, the patients' white blood cells (more exactly T-cells). So there is a genetic mod, within the patient itself. That is what the treatment IS. You can't hope they won't use the method when they are using the method...
So you would rather those people did not go through this. If this method proves efficient, if I ever get CLL, I would much prefer that to bone marrow transplant which is really really risky, because then you have to wipe out your entire immune system! Plus I get to keep my own cells, and not have the risk of reaction to the foreign cells.
If they gave me an allergy in the process, I'd still be alive.
But I strongly believe GM does not cause allergies of that magnitude. Even here we have a huge increase in allergies of all kinds, and we don't even use GM. I more buy into the hygiene hypothesis on allergies. Before someone derails, no I'm not pro GM foods anyway.
Something that actually does increase allergies is the use of soy. Soy is one of the most allergy provoking ones, GM or not. Livestock can get allergic, people ca, workers who handle soy can suddenly die, just unloading soy in harbors have caused people in nearby city drop dead from sudden onset asthma. Soy is used way, way too much.
I will follow this medical news (as I follow a lot of medical news of pure interest, other medical news I follow for personal reasons), and see if those patients die a most horrifying death from allergies or autoimmune...
Cancer research is by a huge mean sponsored by other companies and cancer foundations collecting money from individuals. No one forces you to give to them.
