The World Health Organization (WHO) may lose a quarter of its budget if the US leaves the organization after President-elect Donald Trump takes office in the country, writes Politico.

If the US withdraws from the global health body, as Trump attempted to do in his first term, the WHO could lose its top government donor and hundreds of millions of dollars in contributions.

The president can end US membership in the WHO, an arm of the United Nations, without Congress’ consent as long as he gives a one-year notice and continues paying dues in that year, according to a 1948 resolution.

The US provides about a quarter of the WHO’s core annual budget as a mandatory membership fee but often gives more—with the figure ranging from $163 million to $816 million in recent years, according to health policy think tank KFF.

“The WHO could lose all that money at a time when it finds itself stretched by health emergencies around the world, from ongoing mpox and cholera outbreaks in Africa to the diseases spreading as a consequence of war in Gaza and Sudan, among other places,” Politico noted.

In exchange, America could lose access to the global network that sets the flu vaccine’s composition every year, and US drugmakers could lose the WHO’s help in selling their products, current and former US government officials say.