He gave the closing address at the XIII International AIDS Conference in Durban in 2000, and in 2004, spoke at the XV International AIDS Conference in Bangkok, Thailand, calling for greater measures to tackle tuberculosis as well as HIV/AIDS.
Deu o discurso de peche na XIII Conferencia Internacional do SIDA en Durban no ano 2000, e no ano 2004 deu outro discurso na XV edición da mesma conferencia en Bangkok, Tailandia, pedindo que se tomasen máis medidas para loitar contra a tuberculose e a SIDA.