Foreign Policy reports on "a recent study by Ashley Fox of the Mount Sinai School of Medicine [that] compares rates of HIV infection across 170 regions in 16 sub-Saharan African countries." Fox "found that in the poorest regions, it was richer people who were more likely to be infected with HIV, while in wealthier regions, the poor were more at risk," the magazine writes, adding, "The reason, she argues, is that AIDS acts more like a chronic condition, such as obesity, than the infectious disease it is." "In the three decades since it was identified, AIDS has gone through a remarkable socioeconomic mutation, from a condition closely identified with gay men in urban areas of the United States to one synonymous with poverty in the developing world," Foreign Policy continues, adding, "Fox's data suggest that despite more than 30 million deaths over the past 30-odd years, it's still a disease we don't understand very well" (Keating, November 2012).