On his first day back in the White House, Donald Trump signed an executive order initiating the process for the United States ...

As he signed an executive order, President Donald Trump said that the World Health Organization had "ripped us off." ...

The United States has plans to withdraw from the World Health Organization (WHO), the agency announced Tuesday, right after ...

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.

"Oooh, that's a big one," the newly inaugurated US president said as he approved the document after arriving back at the ...

The World Health Organization said Tuesday it "regrets" US President Donald Trump's decision—just hours after taking power—to ...

Challenge trials help researchers study immune responses. Skeptics still doubt the approach is worth the risks ...

President Donald Trump signed an executive order on his first day back in office to begin withdrawing the United States from ...