The Numbers First

Gavi, the Vaccine Alliance, spends roughly $1.7 billion per year vaccinating children against measles, cholera, diphtheria, polio, and meningitis in 78 low- and middle-income countries. According to Gavi's own accounting — which has not been seriously disputed — the organization has vaccinated over 1.1 billion children since 2000 and prevented more than 18 million deaths.

The U.S. is not the only funder. But it was the third-biggest in 2024, behind the U.K. and the Bill & Melinda Gates Foundation, according to The Conversation. American contributions totaled $3.7 billion between 2000 and early 2025.

The Biden administration pledged $1.6 billion over five years starting in 2026, plus another $300 million for the remainder of 2025. That's the commitment Trump inherited.

What the Trump Administration Actually Did

On June 26, 2025, Health and Human Services Secretary Robert F. Kennedy Jr. announced the administration would NOT honor those commitments, according to The Conversation.

Separately, Congress had already budgeted $600 million for Gavi in fiscal years 2025 and 2026. That money sat at the State Department. The State Department did not send it. Per The Atlantic, those funds expired September 30, 2025. After that deadline passed, the money was gone.

Bipartisan senators reportedly called on the State Department to release the appropriated money before the deadline. Congress appropriated it. The executive branch sat on it.

Kennedy does NOT control State Department funds directly. But a State Department spokesperson told The Atlantic that "President Trump entrusted Secretary Robert F. Kennedy Jr. to manage the U.S. government's relationship with Gavi." So Kennedy owned this decision in practice.

Kennedy's Justification: Weak

Kennedy's stated rationale for defunding Gavi centers on a combination diphtheria-tetanus-pertussis vaccine known as DTwP, which he claims causes brain damage in children. According to The Conversation, scientists and pediatricians have widely disputed this claim — pointing out Kennedy relied on a single contested study based on 40-year-old data.

Gavi also uses newer formulations. Kennedy's framing ignored that entirely.

He additionally accused Gavi, without providing evidence, of ignoring vaccine science and being "lax" on safety, according to The Atlantic. Gavi's track record — 18 million deaths prevented — is the actual data on the table.

Defunding an organization based on cherry-picked, decades-old research is not sound governance.

Who Fills the Gap? Nobody, So Far.

Gavi now has a $3 billion hole in its five-year plan. The U.K. has reaffirmed its $1.7 billion commitment through 2030. The Gates Foundation has reaffirmed $1.6 billion.

But other governments have NOT stepped up to replace U.S. funding, according to The Conversation. Gavi is now cutting costs, hunting for new donors, and likely becoming more dependent on private philanthropy — including corporations like Cisco, Mastercard, and Shell, which already made up over 20% of its 2024 funding.

Private philanthropy can fill gaps. But it comes with trade-offs — donor influence over priorities, less accountability, less stability. That's a legitimate concern even from a free-market standpoint.

The Congressional Appropriation Question

Congress already appropriated the $600 million. This wasn't a debate about whether the U.S. should spend the money — that debate was already settled by law. The executive branch refused to disburse funds that lawmakers from both parties approved. That's a separation-of-powers issue.

When the September 30, 2025 expiration date arrived, $600 million in congressionally budgeted money disappeared. The American taxpayer funded it. It didn't go back to taxpayers. It evaporated.

The Real-World Consequence

When global vaccination coverage drops, the first children to die are in sub-Saharan Africa, Southeast Asia, and Latin America — places where a measles outbreak isn't an inconvenience, it's a death sentence.

At the same time, the U.S. has a legitimate interest in reviewing how foreign aid organizations spend American money. USAID had real accountability problems. The WHO fumbled COVID badly. Asking hard questions about international organizations is not inherently wrong.

But those are questions. Defunding based on a 40-year-old study while sitting on $600 million in already-appropriated funds until a deadline passed was not reform. It was negligence.

The September 30, 2025 deadline passed. The money is gone.