How can demography inform health policy?

Demography's contribution to health policy debates comes from the study of population dynamics relating to fertility, mortality and migration. The aim of this article is to stress how vital a correct understanding of population dynamics is for health policy and planning. The article first highlights some of the major contributions demographers have made to debates about health, particularly where they have helped to overcome misconceptions. It then discusses two prominent issues: population ageing in the developed world and population growth in developing countries.