Adults, defined here as people between 15 and 59 years of age, in deve
loping countries have a high risk of premature death and suffer from f
requent morbidity and high rates of chronic impairment. Their ill heal
th imposes a major burden on health services and large negative conseq
uences on families, communities, and societies. This paper describes t
he level and impact of adult mortality and morbidity, and highlights s
ome of its characteristics and causes, which in some cases contradict
commonly held beliefs. It concludes that ''adult health'' is a legitim
ate public health concern for developing countries that is not being a
ddressed. An agenda for remedial research and action is proposed.