US Set to Quit World Health Organization: What It Means for Global Health

The United States is officially leaving the World Health Organization (WHO), a move that has sent ripples through international health and politics. On January 22, 2026, after a year-long notice period, the U.S. formally exited the WHO — a decision driven by political priorities, criticisms of the organization, and a desire to focus on national health initiatives.

This blog breaks down why the U.S. left, what it means for American and global health, and the potential consequences of this historic move.

Why the US Decided to Leave

The decision traces back to President Donald Trump’s executive order signed on January 20, 2025. The administration argued that the WHO had failed to effectively manage global health crises, including the COVID‑19 pandemic, and claimed the organization had been influenced by politics rather than science.

In the U.S. State Department’s words, the WHO’s shortcomings had cost the United States trillions and exposed weaknesses in global coordination. The withdrawal aligns with the “America First” approach, emphasizing national sovereignty and reducing reliance on international organizations.

The Legal and Financial Details

Leaving the WHO isn’t as simple as sending a letter. According to the WHO constitution, member countries must provide one year’s notice before withdrawing. The U.S. gave notice in January 2025, and it officially left on January 22, 2026.

However, the financial side is more complicated. U.S. law requires that all outstanding contributions be paid before leaving. Currently, the U.S. owes around $260–$278 million in dues, and the Trump administration has indicated it does not plan to pay. This has sparked legal questions about whether the withdrawal is fully compliant with international rules.

Domestic and Global Reactions

Criticism from Experts

Health professionals and global leaders have largely condemned the move. The WHO is crucial for coordinating disease surveillance, distributing vaccines, and providing technical support during outbreaks. Without the U.S., experts warn the country risks being in a “health information silo,” potentially slowing responses to future pandemics.

Countries that rely on WHO support for disease eradication — like polio and tuberculosis — may also face disruptions due to reduced funding and participation.

Support from Advocates

Some U.S. policymakers and supporters of national sovereignty have praised the decision. They argue that the WHO imposes policy constraints and financial burdens without delivering proportional benefits. Redirecting funds to domestic health priorities or alternative partnerships is seen as a better use of resources.

Implications for Global Health

The United States has been a key player in the WHO since its founding in 1948, contributing around 18% of the organization’s budget. Losing this support could create significant gaps in global health initiatives.

Disease Surveillance and Emergency Response

The WHO’s network detects and responds to outbreaks like Ebola, mpox, and COVID‑19. Without full U.S. participation, the timeliness and efficiency of this system may weaken, potentially delaying the global response to new health threats.

Shifts in Global Leadership

The U.S. exit may also shift leadership and influence within the WHO. Other countries or regional blocs might step in to fill the gap, potentially altering global health priorities or approaches.

Could the US Return to the WHO?

It’s possible the U.S. may rejoin the WHO in the future. Previous withdrawals, such as the attempt in 2020, were reversed under a new administration. Factors influencing a return could include political changes, public health crises, or pressure from the global health community.

Final Thoughts

The U.S. leaving the World Health Organization marks a historic change in global health collaboration. While the decision reflects concerns about the WHO’s performance and political considerations, it carries major implications for international cooperation, disease prevention, and global health security.

In an interconnected world, health crises don’t respect borders. Even with its flaws, the WHO has long served as a critical hub for global cooperation, and the U.S. departure leaves both challenges and questions for the future of public health.

Key Takeaways:

The U.S. officially left the WHO on January 22, 2026.

The move is driven by criticisms of WHO performance and political philosophy.

Outstanding financial contributions raise legal questions.

Global health initiatives may face funding and coordination challenges.

Future U.S. administrations could rejoin, depending on political and health factors.