Man "cured" of AIDS: Timothy Ray Brown

Timothy R. Brown attends a press conference to announce the formation of the Timothy Ray Brown Foundation on July 24, 2012, in Washington, DC.

Brown, known as the "Berlin patient," says doctors have told him he's "cured of AIDS and will remain cured." His case is rare:

Brown had a blood stem cell transplant in 2007 to treat leukemia and his blood donor possessed a rare genetic mutation that provides natural resistance to HIV. Doctors declared him "cured" soon after.

Brown addressed the media in the U.S. for the first time Tuesday during the XIX International AIDS Conference in Washington, D.C.

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Actress Sharon Stone greets Timothy Ray Brown, the man "cured" of AIDS, at the "3rd Annual Kiehl's Since 1851 LifeRide For amfAR" at Georgetown on July 20, 2012, in Washington, DC.

Researchers in California recently found traces of HIV in Brown's tissues, but he said remnants of the virus still in his body are dead and can't replicate.

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Actress Sharon Stone (R) poses for a photo with Timothy Ray Brown at the "3rd Annual Kiehl's Since 1851 LifeRide For amfAR" at Georgetown on July 20, 2012, in Washington, DC.

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Timothy Ray Brown attends "Together To End AIDS: An Evening To Benefit amfAR and GBCHealth" at John F. Kennedy Center for the Performing Arts on July 21, 2012, in Washington, DC.

Last June, Brown told CBS News, "I quit taking my HIV medication on the day that I got the transplant and haven't had to take any since."

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Timothy R. Brown takes questions during a press conference to announce the formation of the Timothy Ray Brown Foundation on July 24, 2012, in Washington, DC.

About one percent of Caucasians are thought to have the genetic mutation that makes a person immune to HIV.

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Timothy R. Brown waits to speak at a press conference to announce the formation of a foundation in his name on July 24, 2012, in Washington, DC.

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Timothy Ray Brown poses during the International Symposium HIV & Emerging Infectious Diseases (ISHEID) conference on May 23, 2012, in Marseille, southern France.

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Timothy Ray Brown and Kenneth Cole attend "Together To End AIDS: An Evening To Benefit amfAR and GBCHealth" at John F. Kennedy Center for the Performing Arts on July 21, 2012 in Washington, DC.

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Timothy Ray Brown poses during the International Symposium HIV & Emerging Infectious Diseases (ISHEID) conference on May 23, 2012, in Marseille, southern France.

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Timothy Ray Brown poses during the International Symposium HIV & Emerging Infectious Diseases (ISHEID) conference on May 23, 2012, in Marseille, southern France.

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David Purdy (L), co-founder of World AIDS Institute, Timothy R. Brown (C) and Chad Johnson, co-founder of the World AIDS Institute, are seen after a press conference to announce the formation of the Timothy Ray Brown Foundation on July 24, 2012 in Washington, DC.

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