Using your own cells. They are collected and frozen before high-dose chemotherapy, then returned to help your marrow recover.
The healthy stem cells are infused through a central venous catheter (like a blood transfusion). A Guide to Bone Marrow Transplantation
is defined as "engraftment"—when the donor cells begin producing new white blood cells. Life After Transplant: The "New Normal" Using your own cells
You essentially become a newborn. You will likely need to repeat all childhood vaccinations. A Guide to Bone Marrow Transplantation
(detailed cellular biology vs. patient-friendly language)