Trump Wants To Pull The Us Out Of The World Health Organization Again. Here's What May Happen Next

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 Organization for the second time in less than five years - a move many scientists fear could roll back decades-long gains made in fighting infectious diseases like AIDS, malaria and tuberculosis.

Experts have also cautioned that withdrawing from the organization could weaken the world's defenses against dangerous new outbreaks capable of triggering pandemics.

Here's a look at what Trump's decision means:

What happened?

During the first Oval Office appearance of his second term, Trump signed an executive order detailing how the withdrawal process might begin.