Like most primates, Koko is sensitive about her weight. Here she is standing on a scale while Penny reads the results. Koko knows that to control her weight, she has to watch both her caloric (ie, food) intake and her activity levels.
Changes in life expectancy in some hard-hit African countries between 1960 and 2012. HIV and AIDS affects economic growth by reducing the availability of human capital. Without proper prevention, nutrition, health care and medicine that is available in developing countries, large numbers of people are falling victim to AIDS. People living with HIV/AIDS will not only be unable to work, but will also require significant medical care.
Aging and HIV/AIDS have drastic effects on the immune system; each lower the production of T cells needed to defend the body against infection. Furthermore, evidence suggests that HIV may accelerate the aging process, and reduce an individual's T-cell count in a similar way to someone who is 20 to 30 years older.