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U.S. Bill Gates, co-founder of the Bill and Melinda Gates Foundation and Chairman and Chief Software Architect, Microsoft Corporation, speaks during a press conference before he adresses to the 58th World Health Assembly at the United Nations in Geneva, Switzerland, Monday, May 16, 2005. The Fifty-eighth World Health Assembly will takes place from 16 to May 25, bringing together delegates from WHO's 192 Member States to discuss key public health issues. (KEYSTONE/Laurent Gillieron)