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,

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.

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.