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.

Donald Trump's decision will have an even greater impact on the WHO, as the US is the main funder of the UN organization. This situation is likely to complicate many health policies, including the fight against future pandemics.

On his first day back in the White House, US President Donald Trump began the process of withdrawing the US from the World Health Organization (WHO). Trump had initiated the US pullout during his first term,