At the international level, in 1985 she was a delegate at Nairobi's World Conference on Women and has since served as a board member of PAHO, WHO, UNICEF, UNIFEM and UNFPA. She also participated in the 1994 International Conference on Population and Development in Cairo, the 1992 UN Earth Summit in Rio de Janeiro, the 1995 World Conference on Women in Beijing, and the 1995 UN World Summit for Social Development in Copenhagen. A pioneer in research on the prevention of HIV|AIDS, she helped establish UNAIDS in 1994.