HIV/AIDS has been identified in virtually every region of the world,
reaching epidemic levels and affecting the lives of millions of men,
women, and children of all ages, races, ethnicities, religions, and
sexual orientations. Despite its widespread devastation, HIV/AIDS is
a relatively new illness. Chapter 1 first describes HIV and AIDS, then
outlines how HIV and AIDS were discovered and increasingly understood.
Chapter 1 goes on to describe the epidemiology of the HIV/AIDS epidemic,
presenting data on the number of people living with and dying from AIDS.
Chapter 1 closes with a brief overview of useful epidemiological terms.