Is the level of functional or metabolic efficiency of a living organism. In humans, it is the general condition of a person's mind and body, usually meaning to be free from illness, injury or pain (as in “good health” or “healthy”).
The World Health Organization (WHO) defined health in its broader sense in 1946 as “a state of complete physical, mental, and social well-being and not merely the absence of disease or infirmity.”
Although this definition has been subject to controversy, in particular as lacking operational value and because of the problem created by use of the word “complete,” it remains the most enduring.
Other definitions have been proposed, among which a recent definition that correlates health and personal satisfaction.
Classification systems such as the WHO Family of International Classifications, including the International Classification of Functioning, Disability and Health (ICF) and the International Classification of Diseases (ICD), are commonly used to define and measure the components of health.
Health Status (Latin plural: statūs), is a state, condition, or situation.
Global health is the health of populations in a global 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, reduction of disparities, and protection against global threats that disregard national borders.
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.
Global health can be measured as a function of various global diseases and their prevalence in the world and threat to decrease life in the present day.
The predominant agency associated with global health (and international health) is the World Health Organization (WHO). Other important agencies impacting global health include UNICEF, World Food Programme, and the World Bank. The United Nations has also played a part with declaration of the Millennium Development Goals and the more recent Sustainable Development Goals.