My husband is 10 months post transplant and his most recent chimerism test (July) shows it has dropped from 97% to 77% his blood results are all in the normal range though. Is this to be expected? A DLI has been suggested and in the meantime we are to reduce is tacrolimus. I'm just really shocked as he was doing so well. The consultant he saw today was a bit vague about the significance if it all.