Doctors say they have made an amazing discovery in the race to cure AIDS.
Experts say two patients, who were diagnosed with the HIV virus, underwent bone marrow transplants to treat lymphoma.
The pair received bone marrow that did not contain the virus.
However, the patients continued to take their medication to treat HIV.
Experts say that move kept the bone marrow from becoming infected.
Now, they have stopped taking their medicine and doctors can no longer detect HIV in their bodies.
The patients have been HIV free for three and four years.
Doctors say it is not a cure but it is a step in the right direction.