Key Takeaways

383 clinical trials lost NIH funding, affecting more than 74,000 people

Cuts hit HIV, COVID-19, mental health and cancer studies the hardest

Some grants were reinstated, but researchers say many studies were harmed

TUESDAY, Nov. 18, 2025 (HealthDay News) — Thousands of clinical trial participants lost access to important medical studies this year after the Trump administration terminated hundreds of National Institutes of Health (NIH) grants, according to new research published in JAMA Internal Medicine .

The study found that 383 clinical trials had their NIH funding cut this year between late February and August, affecting more than 74,000 participants nationwide.

Many of the canceled studies focused on infectious diseases, including HIV and COVID-19 , as well as

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