Addressing the second day of the International AIDS Conference in Washington Monday, she said the U.S. is working to build sustainable health systems that will help the world "finally win this fight."
With that goal, she said the U.S. is ready to invest, in Africa and elsewhere, in clinics that help slow mother-to-child transmissions. She praised male circumcision programs in Africa that have been highly effective in slowing the spread of HIV/AIDS.
British rock start Elton John spoke against stigma, hate and ignorance that he said hamper the fight against the spread of AIDS.
The United Nations says 34 million people live with HIV / AIDS and 1.7 million died from the disease in 2011.
The conference is expected to draw more than 20,000 people.
Some information for this report was provided by Reuters.