As the fastest-growing region in the world, sub-Saharan Africa is confronting many of the greatest global health and development challenges. With a population of more than 840 million, and growing at the rate of 2.4 percent per year, sub-Saharan Africa will double in size in just 30 years. It is widely accepted that the future of sub-Saharan Africa rests to a great extent on the investments made in the education, health, and employment opportunities of its youth, and on how successfully its youth transition to a healthy and productive adulthood.