Foreword
Sub-Saharan Africa, the area of the African continent that lies south of the Sahara Desert, is one of the poorest regions of the world and contains many of the world’s least-developed countries. The average life expectancy there is only 46 years, and the people are ravaged by diseases that have been largely eradicated — or at least controlled — elsewhere. The region has just over 10 percent of the world’s population, yet is home to nearly 70 percent of all people living with HIV, or human immunodeficiency virus, a retrovirus that can lead to acquired immunodeficiency syndrome (AIDS). Of the…
