President Donald Trump signed an executive order that would begin the process of removing the U.S. from the World Health Organization. Here's why.

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.

Experts have also cautioned that withdrawing from the organization could weaken the world’s defenses against dangerous new outbreaks.