A nurse (L) hands out a red ribbon to a woman, to mark World Aids Day, at the entrance of Emilio Ribas Hospital, in Sao Paulo December 1, 2014. The world has finally reached "the beginning of the end" of the AIDS pandemic that has infected and killed millions in the past 30 years, according to a leading campaign group fighting HIV. United Nations data show that in 2013, 35 million people were living with HIV, 2.1 million people were newly infected with the virus and some 1.5 million people died of AIDS. By far the greatest part of the HIV/AIDS burden is in sub-Saharan Africa. REUTERS/Nacho Doce (BRAZIL - Tags: HEALTH SOCIETY)