After receiving a stem cell transplant from his brother, a 63-year-old Norwegian man known as the "Oslo patient" has become one of only a handful of people to see their HIV (human immunodeficiency virus ) go into long-term remission. While HIV can now be controlled with medication that stops the virus from replicating, the virus remains in the body , rebounding when the drugs are stopped. So case studies like this one are invaluable for researchers working towards a full cure. The Oslo man was