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HHS Withdraws $766 Million From Moderna’s Bird Flu Vaccine Program

Health officials cite safety uncertainties in mRNA vaccine testing, prompting Moderna to seek alternative funding as H5N1 cases climb.

Moderna logo is seen in Warsaw, Poland on April 9, 2025. (Photo by Jakub Porzycki/NurPhoto via Getty Images)
Cambridge, MA, USA - June 29, 2022: Moderna logo is seen at the entrance to its headquarters in Cambridge, Massachusetts. Moderna, Inc., is an American pharmaceutical and biotechnology company.
Dr. Albert Bourla, Chairman and CEO, Pfizer speaks onstage during The Wall Street Journal's 2024 The Future Of Everything Festival at Spring Studios on May 22, 2024 in New York City.

Overview

  • The Trump administration terminated two BARDA awards—a $176 million grant from July 2024 and a $590 million award from January 2025—for Moderna’s H5N1 vaccine development program.
  • HHS Communications Director Andrew Nixon said the mRNA platform remained under-tested and that the project failed to meet scientific and safety expectations.
  • Moderna reported interim Phase 1/2 trial data in 300 adults showing a robust immune response and favorable safety profile, and the company is exploring new funding routes.
  • Public health experts including Dr. Ashish Jha argued that cutting mRNA vaccine support could slow rapid response capabilities if bird flu evolves toward human-to-human transmission.
  • The H5N1 outbreak has spread among poultry and cattle in multiple states and infected over 70 farmworkers in the US, resulting in one death and prompting pandemic preparedness concerns.