Public health experts say there could be massive implications after President Trump signed an executive order withdrawing the U.S. from the World Health Organization.

Public health experts say U.S. withdrawal from the W.H.O. would undermine the nation’s standing as a global health leader and make it harder to fight the next pandemic.

President Donald Trump is pulling the U.S. out of the World Health Organization for a second time, the White House announced late Monday. The day-one executive order fulfills Trump's campaign promise to reject global institutions.