A bone marrow harvest.

“Timothy Ray Brown, a 45-year-old San Francisco man previously known to the medical community as “the Berlin patient,” has become the first person to ever be cured of AIDS.

After a stem cell bone marrow transplant, doctors say his HIV, the infection which causes AIDS, was eradicated.

His bone marrow donor was one of a very small percentage of people who are immune to HIV.” (via Raw Replay).