The World Health Organization (WHO) is a specialized agency of the United Nations responsible for international public health. It is headquartered in Geneva, Switzerland, and has six regional offices and 150 field offices worldwide.
The WHO was established on April 7, 1948, and convened its first meeting on July 24 of that year. It incorporated the assets, personnel, and duties of the League of Nations' Health Organization and the Paris-based Office International d'Hygiène Publique, including the International Classification of Diseases (ICD). The agency's work began in earnest in 1951 after a significant infusion of financial and technical resources.
The WHO's official mandate is to promote health and safety while helping the vulnerable worldwide. It provides technical assistance to countries, sets international health standards, collects data on global health issues, and serves as a forum for scientific or policy discussions related to health. Its official publication, the World Health Report, provides assessments of worldwide health topics.
The WHO has played a leading role in several public health achievements, most notably the eradication of smallpox, the near-eradication of polio, and the development of an Ebola vaccine. Its current priorities include communicable diseases, such as HIV/AIDS, Ebola, malaria and tuberculosis; non-communicable diseases such as heart disease and cancer; healthy diet, nutrition, and food security; occupational health; and substance abuse. The agency advocates for universal health care coverage, engagement with the monitoring of public health risks, coordinating responses to health emergencies, and promoting health and well-being generally.
The WHO is governed by the World Health Assembly (WHA), which is composed of its 194 member states. The WHA elects and advises an executive board made up of 34 health specialists; selects the WHO's chief administrator, the director-general (currently Tedros Adhanom Ghebreyesus of Ethiopia); sets goals and priorities; and approves the budget and activities. The WHO is funded primarily by contributions from member states (both assessed and voluntary), followed by private donors. Its total approved budget for 2020–2021 is over $7.2 billion., while the approved budget for 2022–2023 is over $6.2 billion.
