WHO’s constitution, drafted in New York, doesn’t have a clear exit method for member states. A joint resolution by Congress in 1948 outlined that the U.S. can withdraw with one year's notice. This is contingent, however, on ensuring that its financial obligations to WHO “shall be met in full for the organization’s current fiscal year.”

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.

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.

World leaders congratulated President Donald Trump on his inauguration Monday, with many urging stronger alliances or continued cooperation between their countries and the United States, in carefully crafted social media posts and statements.

"The bottom line is that withdrawing from the WHO makes Americans and the world less safe," says Dr. Tom Frieden, president and CEO of the nonprofit health organization Resolve to Save Lives and former director of the U.S. Centers for Disease Control and Prevention (CDC).

President Trump’s executive order for the U.S. to withdraw from the World Health Organization could greatly impact the nation’s ability to track and respond to global disease threats.

The White House on Wednesday summarized U.S. President Donald Trump's sweeping crackdown this week at the U.S.-Mexico border.

President Donald Trump used one of the flurry of executive actions that he issued on his first day back in the White House to begin the process of withdrawing the U.S. from the World Health

President Trump signed an executive order​ on the first day of his second term, beginning the process of withdrawing the U.S. from the World Health Organization.

The WHO is a United Nations agency that aims to expand universal health coverage, coordinates responses to health emergencies such as pandemics, and has a broad focus on healthy lives. It does not have the power to enforce health policy, but influences policy worldwide, especially in low-income countries.

U.S. President Donald Trump has signed a blizzard of executive orders and taken other actions since being sworn in on Monday on scores of issues that could have an impact on the lives of millions of Americans and non-citizens.