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What the US exit from the WHO means for global health and pandemic preparedness

President Trump signed an executive order to withdraw the country from the global health organization to which it is the biggest donor.

A sign reading 'World Health Organization' with the logo on top all in blue.
The U.S. was responsible for 22% of mandatory contributions to the World Helath Organization during the two-year period from 2024 to 2025.  AP photo by Martial Trezzini/Keystone

A health organization created in the wake of World War II to fight disease across the planet is losing its biggest donor, the United States.

Critical of the World Health Organization’s handling of the COVID pandemic, President Donald Trump signed an order Monday for the U.S. to withdraw from the organization that helps track outbreaks of disease around the globe and provides research and resources for fighting everything from tuberculosis to maternal mortality.

Northeastern University experts in global and public health describe what the WHO is, who pays for it and the impact a U.S. withdrawal will have on the health of Americans and others.

Not a household name

Headquartered in Geneva, the World Health Organization may not be a household name like the Centers for Disease Control and Prevention (CDC) but it’s been around for nearly 80 years.

“The World Health Organization is an international agency that was set up back in 1948 by U.N. member states to set global health policies and priorities,” says Aleksandra Jakubowski, an assistant professor in health sciences and economics at Northeastern.

“It helps us figure out where to allocate our resources, both in terms of research and funding allocations,” she says. It also uses a global network of disease surveillance to determine “where we really need to focus more of our attention to help the communities that are most affected.”

WHO researchers and contacts respond to outbreaks of ebola, malaria, tuberculosis and HIV and, most recently, Marburg disease in Tanzania.

Smallpox eradication is probably one of WHO’s best known achievements, Jakubowski says.

The U.S. is WHO’s biggest donor

There are two types of contributions to the WHO — mandatory contributions by member nations and voluntary donations by countries and organizations such as the Gates Foundation, says Richard Wamai, a Northeastern professor of public health.

Mandatory contributions “are determined based on the population size of a country as well as countries’ GDP (gross domestic product),” Jakubowski says. 

“The U.S. has a very large population, and we are the wealthiest nation. So that’s why we pay a lot in member fees,” she says. 

According to Reuters, the U.S. was responsible for 22% of mandatory contributions to the WHO during the two-year period from 2024 to 2025, with China coming in second at about 16%.

When it comes to overall funding — voluntary and mandatory — the overall U.S. contribution comes to 18%. The WHO’s most recent two-year budget is $6.8 billion, according to Reuters.

The U.S. withdrawal “would be a lot of funding (for WHO) to make up for,” Jakubowski says. 

Without a change of heart or massive infusion of private dollars, “The alternative is that the WHO budget just gets a lot slimmer,” she says.

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