Norwegian Patient Cured of HIV After Stem Cell Transplant

A 63-year-old man, referred to as the Oslo patient, is likely cured of HIV following a stem-cell transplant that remodeled his entire immune system. Doctors announced the findings on April 13, 2026, in the journal Nature Microbiology.

The patient underwent the HIV-eliminating transplant procedure at age 58 and has remained in remission for five years. This case adds to a small number of individuals who have achieved long-term remission from the virus after receiving bone marrow transplants.

The Role of Genetic Resistance

While previous cases of HIV remission following transplants involved cells from unrelated donors, the Oslo patient received transplanted cells from his brother. The success of the procedure was tied to a specific genetic mutation carried by the sibling.

The brother possessed a mutation known as CCR5 delta 32. This mutation disables a protein on the surface of immune cells that the HIV virus typically exploits to trigger an infection. Because the brother carried two copies of this mutation, the virus was effectively locked out of the cells that usually serve as its primary targets.

Statistical Rarity of the Match

The medical team highlighted the rarity of this specific scenario. According to study co-author Dr. [Name not provided], there are two significant statistical hurdles in such a case:

• A sibling has only a 25% probability of being a match for a transplant.
• The frequency of the CCR5Δ32/Δ32 mutation is approximately 1% within northern European populations.

Medical Context and Implications

The procedure effectively replaced the patient’s immune system with one that is genetically resistant to HIV. This approach has been seen in a handful of other patients, though the familial connection in this instance provided a unique path to remission.

The announcement on April 13, 2026, confirms that the patient remains in remission at age 63, five years after the initial procedure.