World Health Organization (WHO)

The World Health Organization is the United Nations' specialized agency for international public health, headquartered in Geneva, Switzerland. It sets global health norms and standards, coordinates responses to international disease outbreaks, and provides technical support to national health systems, particularly in lower-income countries. It is funded through a mix of mandatory member-state assessments and voluntary contributions, the latter of which make up the large majority of its budget and give major donors significant informal influence over its priorities.

WHO's clearest historical impact is smallpox eradication, which by most estimates has prevented hundreds of millions of deaths in the decades since. It maintains the International Classification of Diseases (ICD), used by virtually every national health system for diagnostic coding and mortality statistics, and its Essential Medicines List influences drug procurement policy worldwide. It is also a genuinely contested institution: criticized from different directions for being too slow and diplomatically cautious in emergencies (raised repeatedly around COVID-19), for being overly dependent on a small number of large voluntary donors, and for the practical limits of an organization with no enforcement power over sovereign member states.