My sister suffers from aplastic anemia. A few years ago her condition was very critical. None of us (her family), or anyone in the national databases, were suitable donors for marrow transplantation.
Thankfully, with praise to God, she is doing quite well now (and has been for a good time now). As I understand it, she will always have difficulties because of having aplastic anemia, but by the grace of God she lives well now, and is pursuing her life goals.