The US finalized its withdrawal from the World Health Organization (WHO) on Thursday, formalizing the Trump administration's decision.[1] Donald Trump signed an executive order withdrawing from the WHO on January 20, 2025 shortly after his return to the White House.[1] According to WHO Chief Legal Counsel Steve Solomon, it is not entirely clear when exactly withdrawal will occur because the WHO's founding document does not have a withdrawal clause, but the US reserved the right to withdraw under conditions in 1948.[1] One condition is termination with a year's notice, and the other is the fulfillment of financial obligations for the current fiscal year.[1] The United States is late with payments for 2024 and 2025, so WHO member states must consider whether they have met the second condition.[1] WHO Director General Tedros Adhanom Ghebreyesus called the US withdrawal a loss for the United States and for the entire world, especially in the area of health security.[1] He expressed hope that Washington would reconsider the decision and rejoin.[1] The decision is part of a broader US withdrawal from 66 international organizations, including 31 under the UN.[2][3][4]