All things are possible
We continue now waiting for his blood counts to start going up, which they say would happen around day +14, because that is the "bingo" moment that W's cells have woken up in his system. From that point on, he will have a new immunity courtesy of lil brother. Until then, he has nothing. So we simply need to be vigilant about keeping him free of infections, and then as the new cells graft into his system, the doctors are alert for signs of skin rashes that may irritate him if not tightly controlled. Beyond that, our concern would always be what they call graft v. host disease, a condition where his new cells see the body as a foreign system and starts to attack itself repeatedly. This is something to be concerned with for about a year. The chances of that happening are there, but less likely when you have a perfect sibling match. So the big question: how's he doing? They told us to be prepared for what is to come. They told us rarely do transplant patients do okay ...