When in remission
The other part of the answer is the timing of the transplant
for the above disorders.
While it is common to consider transplant as a 'last resort' or 'only if the disease relapses', that usually is the wrong time to do it. Transplants of all types work best if the patient is robust and in remission at the start. That's often why it is so hard to determine the 'right' time to take the risk.