Global health

Global health is the health of the populations in the worldwide context; it has been defined as "the area of study, research, and practice that places a priority on improving health and achieving equity in health for all people worldwide". Problems that transcend national borders or have a global political and economic impact are often emphasized. Thus, global health is about worldwide health improvement (including mental health), reduction of disparities, and protection against global threats that disregard national borders, including the most common causes of human death and years of life lost from a global perspective.

Global health is not to be confused with international health, which is defined as the branch of public health focusing on developing nations and foreign aid efforts by industrialized countries.

One way that global health can be measured is through the prevalence of various global diseases in the world and their threat to decrease life expectancy in the present day. Estimates suggest that in a pre-modern, poor world, life expectancy was around 30 years in all regions of the world (mainly due to high infant mortality). Another holistic perspective called One Health can be used to address global health challenges and to improve global health security.

The predominant agency associated with global health (and international health) is the World Health Organization (WHO). Other important agencies impacting global health include UNICEF and World Food Programme (WFP). The United Nations system has also played a part in cross-sectoral actions to address global health and its underlying socioeconomic determinants with the declaration of the Millennium Development Goals and the more recent Sustainable Development Goals.