What does the United States' withdrawal from the World Health Organization mean for global health and future pandemic preparedness?

The formal withdrawal of the US from the WHO took place on January 22, 2026 and marks a major rupture in global health governance. The withdrawal was initiated by the Trump administration in January 2025 and has resulted in the termination of all US government funding to the WHO, the recall of US personnel, the suspension of hundreds of collaborative engagements, and the end of the US participation in WHO governance structures. This decision seems to reflect a broader political disengagement from multilateral institutions in which US influence is increasingly contested. This editorial examines how the sudden removal of approximately a fifth of the WHO’s revenue, coupled with the loss of the technical expertise of US agencies, has severely constrained the organization’s capacity to conduct disease surveillance, coordinate emergency responses, and uphold global scientific norms. As the US withdrawal from the WHO coincides with a freeze on the US Agency for International Development (USAID) global health funds, the destabilizing effects of this decision particularly compound on low‑ and middle-income countries reliant on WHO-coordinated programs. Emerging analyses indicate that the disruptions to supply chains for diagnostics, therapeutics, and vaccines may significantly weaken global preparedness for future pandemics, while forecast models suggest that if the USAID funding cuts are not reversed, they, alone, could lead to millions of avoidable deaths by 2030, thereby reversing decades of progress in the fields of infectious disease control and maternal–child health. Institutionally, the WHO now faces the dual challenge of navigating acute financial instability while accelerating reforms aiming to diversify its funding base and allow it to maintain operational continuity. Beyond immediate operational disruptions, the US withdrawal from the WHO erodes the legitimacy of multilateral health cooperation and deepens global health inequities. Rebuilding trust, restoring funding, and re‑establishing scientific cooperation will be essential in preventing the emergence of a more inequitable and vulnerable global health landscape.