Hours after taking office for a second term, President Donald Trump signed an executive order withdrawing the United States from the World Health Organization (WHO).

More than half of Americans believe the U.S. benefits from its membership in the WHO. As of April 2024, 25% of U.S. adults say the country benefits a great deal from its membership, while about one-third say it benefits a fair amount. Conversely, 38% say the U.S. does not benefit much or at all from WHO membership.

Ooh, that’s a big one,” Donald Trump said Monday as he signed an executive order – one of dozens during his first hours as president – to withdraw the United States from the World Health Organization.

The U.S. has traditionally been the most generous benefactor of the WHO. A Trump executive order to cut ties with the WHO could pose a threat to global public health.

Public health experts say the United States’ departure could cripple the WHO’s operations or leave an opening for China to assume greater control over the agency.

One of President Trump’s first executive orders removes the U.S. from the global health organization, which experts say is “cataclysmic.”

As part of a rash of executive orders completed on his first day back in the White House, President Donald Trump began the nation’s exit from the World Health Organization. Here, we explain how the withdrawal would work and what it would mean,