[fzeroracer]

This seems like a little bit of a fearmongering. We're slowly understanding GVHD and GVT issues, suppressing one while keeping the other. The frequency of GVHD has been going down over time as we better match donors to the patient.

There are a lot of treatments that started off just like this. For things we thought we would never have a proper cure for, until we gradually understood how treatment worked and how to refine that treatment.