Not really. Bone marrow transplants are very dangerous and require HLA types to match. HLA type is like blood type matching except way more specific. The chances of a person having matching HLA types with someone else is close to zero. Sadly, it's not uncommon for people who actually need bone marrow transplants to die because no registered donors compatible with them could be found.
Pigeoncow t1_j9h6zo9 wrote
Reply to comment by NickOnMars in Third person cured of HIV after stem cell transplant, researchers say by esprit-de-lescalier
Not really. Bone marrow transplants are very dangerous and require HLA types to match. HLA type is like blood type matching except way more specific. The chances of a person having matching HLA types with someone else is close to zero. Sadly, it's not uncommon for people who actually need bone marrow transplants to die because no registered donors compatible with them could be found.