NEW YORK/LONDON/ GENEVA: The United States will leave the World Health Organization, President Donald Trump said on Monday, saying the global health agency had mishandled the COVID-19 pandemic and other international health crises.

Trump said the WHO had failed to act independently from the “inappropriate political influence of WHO member states” and required “unfairly onerous payments” from the US that were disproportionate to the sums provided by other, larger countries, such as China.

“World Health ripped us off, everybody rips off the United States. It’s not going to happen anymore,” Trump said at the signing of an executive order on the withdrawal, shortly after his inauguration to a second term.

The WHO said on Tuesday that it regretted the move from its top donor country.

“We hope that the United States will reconsider, and we really hope that there will be constructive dialogue for the benefit of everyone, for Americans but also for people around the world,” WHO spokesperson Tarik Jasarevic told reporters in Geneva.

The move sets a 12-month notice period for the US to leave the United Nations health agency and stop all financial contributions to its work. The United States is by far the WHO’s biggest financial backer, contributing around 18% of its overall funding. WHO’s most recent two-year budget, for 2024-2025, was $6.8 billion.

The US departure is likely to put at risk programs across the organization, according to several experts both inside and outside the WHO, notably those tackling tuberculosis, the world’s biggest infectious disease killer, as well as HIV/AIDS and other health emergencies.