Doctors can no longer detect the AIDS virus in two patients after they underwent a bone marrow transplant to treat their cancer diagnosis.
Doctors at Brigham and Women's Hospital in Boston aren't calling it a cure -- but they are intrigued by the results.
The men underwent bone marrow transplants to treat lymphoma, but in the process received bone marrow that was free of HIV.
They continued to take their HIV drug cocktail, which researchers say kept the new bone marrow from becoming infected.
Now they have stopped taking the drug cocktail and they still have no traces of the HIV in their body.
The patients have been HIV free for three and four years.