Why and how did so many Africans become infected with HIV? How is it that sub-Saharan Africa is the region of the world most severely impacted by AIDS? What underlying processes may have contributed to the spread of AIDS in Africa? And why do certain regions and countries of Africa have higher numbers of people who are HIV positive?

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lena772 · Answer

Take a look at this article: http://discovermagazine.com/2003/jun/breakaids#.Uux_k1uBpDQ