Since its discovery in 1983, the human immunodeficiency virus (HIV) has been associated with a global pandemic that has affected more than 60 million people and caused more than 30 million deaths. The highest prevalence rates are in sub-Saharan Africa and other parts of the developing world. The impact of HIV in some African countries has been sufficient to reverse population growth and reduce life expectancy into the mid thirties, although HIV incidence has recently declined in some of these high-prevalence countries. However, there are large-scale epidemics of HIV elsewhere, e.g....

Since its discovery in 1983, the human immunodeficiency virus (HIV) has been associated with a global pandemic that has affected more than 60 million people and caused more than 30 million deaths. The highest prevalence rates are in sub-Saharan Africa and other parts of the developing world. The impact of HIV in some African countries has been sufficient to reverse population growth and reduce life expectancy into the mid thirties, although HIV incidence has recently declined in some of these high-prevalence countries. However, there are large-scale epidemics of HIV elsewhere, e.g. India, the Russian Federation, and eastern Europe....