The World Health Organization on Tuesday appealed for $1 billion to tackle health crises this year across the world's 36 most severe emergencies, including in Gaza, Sudan, Haiti and Afghanistan.
Hit by deep cuts in foreign aid from wealthy countries, the WHO made its emergency request significantly lower than in recent years, saying it had to be realistic about how much money would arrive.
"We are deeply worried about the vast needs and how we will meet them," WHO health emergencies chief Chikwe Ihekweazu told reporters in Geneva.
"We are making some of the hardest choices we have to make."
The WHO estimated 239 million people would need urgent humanitarian assistance this year, and said the money would keep essential health services afloat.
"A quarter of a billion people are living through humanitarian crises that strip away the most basic protections: safety, shelter and access to health care," Ihekweazu said.
"In these settings, health needs are surging, whether due to injuries, disease outbreaks, malnutrition or untreated chronic diseases," he warned.
Washington, traditionally the UN health agency's biggest donor, has slashed foreign aid spending under President Donald Trump, who on his first day back in office in January 2025 handed the WHO his country's one-year withdrawal notice.
Last year, the WHO appealed for $1.5 billion, but Ihekweazu said only $900 million came through -- below 2016 levels.