Public health experts say the United States’ departure could cripple the WHO’s operations or leave an opening for China to assume greater control over the agency.

The United States will leave the World Health Organization, President Donald Trump said on Monday, saying the global health agency had mishandled the COVID-19 pandemic and other international health crises.

The WHO is a United Nations agency that aims to expand universal health coverage, coordinates responses to health emergencies such as pandemics, and has a broad focus on healthy lives. It does not have the power to enforce health policy, but influences policy worldwide, especially in low-income countries.