Timothy Henrich of the Harvard-affiliated Brigham and Women's Hospital in Boston speaks at the International AIDS Society Conference 2013 in Kuala Lumpur, Malaysia, Wednesday, July 3, 2

 

              Timothy Henrich of the Harvard-affiliated Brigham and Women
Timothy Henrich of the Harvard-affiliated Brigham and Women's Hospital in Boston speaks at the International AIDS Society Conference 2013 in Kuala Lumpur, Malaysia, Wednesday, July 3, 2013. Two HIV-positive patients in the United States who underwent bone marrow transplants for cancer have stopped anti-retroviral therapy and still show no detectable sign of the HIV virus, researchers said Wednesday. (AP Photo/Lai Seng Sin)