US Officially Leaves World Health Organization After Decades of Partnership

22 January 2026

The United States has formally exited the World Health Organization, concluding nearly eight decades of membership and sparking global debate about the future of international public health cooperation. On January 22, 2026, after a yearlong withdrawal process initiated by an executive order from President Donald Trump on his first day back in office in 2025, Washington ended its affiliation with the United Nations health agency. The decision reflects deep dissatisfaction within the U.S. administration over the WHO’s handling of past health emergencies and its broader governance.

For the WHO, the departure of its largest historical funder represents an unprecedented financial shock. The United States traditionally accounted for around 18 percent of the agency’s overall budget, and its abrupt exit has forced the organization to undertake severe belt-tightening measures, including halving its management team and planning to reduce staff by about a quarter. Without U.S. contributions, the WHO must reorient its operations during a period of growing global health challenges.

The U.S. administration’s public rationale for leaving the WHO centers on long-standing criticisms that the agency mishandled the COVID-19 pandemic, failed to institute necessary reforms, and remained too susceptible to political influence by member states. In formal statements, the Department of Health and Human Services and the State Department said that the WHO’s response to the pandemic demonstrated weaknesses that eroded global trust and justified a shift toward direct bilateral engagements with other nations and international partners on disease surveillance and health security.

However, the withdrawal has not been without legal controversy. U.S. law requires a one-year notice period and, traditionally, settlement of outstanding dues before a country can depart from the organization. Washington’s position is that it is not obligated to complete payment of approximately $260 million in unpaid fees covering 2024 and 2025 before the exit takes effect, a stance that has drawn sharp criticism from legal observers and WHO officials. Critics argue that ignoring these financial obligations undermines established treaty commitments and could set a problematic precedent for international agreements.

Globally, public health experts have sounded the alarm about the potential consequences of the U.S. withdrawal. Many emphasize that modern health threats disregard national borders and that collaborative structures like the WHO are indispensable for orchestrating coordinated responses to pandemics, epidemics and other large-scale health emergencies. Concerns also extend to specific technical functions, such as the Global Influenza Surveillance and Response System, which has historically depended on broad participation to monitor circulating flu strains and develop effective vaccines.

Some public health authorities have underscored the potential impact on both international and domestic health readiness. Without formal access to WHO’s extensive data and networks, U.S. agencies like the Centers for Disease Control and Prevention and the National Institutes of Health could face gaps in critical surveillance information, potentially hampering rapid identification of emerging threats. Additionally, experts contend that the absence of U.S. leadership within the organization diminishes the country’s ability to influence health policy and standard-setting on the global stage.

The WHO itself expressed regret at the official end of U.S. membership. Director-General Tedros Adhanom Ghebreyesus reiterated the organization’s commitment to protecting global health and emphasized that its systems, which operate continuously across countries, have contributed to preparedness and response efforts worldwide. In public remarks, the WHO has held out hope that the United States might one day reconsider its position, even as formal ties have been severed.

In the wake of the U.S. departure, responses from within the United States have been mixed. Some state and local leaders have taken steps to maintain ties with global health networks. California, for example, announced it would join the WHO’s Global Outbreak Alert and Response Network independently, reflecting continued subnational interest in participating in international health collaboration.

Supporters of the withdrawal argue that it reaffirms American sovereignty in public health decision-making and allows the United States to pursue more targeted partnerships that align directly with its national interests. They contend that bilateral agreements and cooperation outside the multilateral WHO framework can be more agile and efficient. Yet, this approach also raises questions about the ability of unilateral or narrowly focused efforts to substitute for the comprehensive reach and legitimacy of a global institution like the WHO.

As the world adjusts to this landmark shift, the broader implications for global health governance will continue to unfold. The U.S. exit from the WHO not only reshapes the landscape of international cooperation but also highlights enduring tensions between national prerogatives and collective action in addressing challenges that transcend borders. Whether this bold move will strengthen or weaken global health resilience over the long term remains a defining question for policymakers, scientists and communities worldwide.