• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
PoliticsFDA

Top US vaccine official resigns citing RFK ‘misinformation’ push

By
Rachel Cohrs Zhang
Rachel Cohrs Zhang
and
Bloomberg
Bloomberg
Down Arrow Button Icon
By
Rachel Cohrs Zhang
Rachel Cohrs Zhang
and
Bloomberg
Bloomberg
Down Arrow Button Icon
March 29, 2025, 10:43 AM ET
Peter Marks on Capitol Hill in 2021.
Peter Marks on Capitol Hill in 2021.Greg Nash—The Hill/Bloomberg via Getty Images

The Food and Drug Administration’s top vaccine regulator abruptly resigned Friday, citing what he called Health and Human Services Secretary Robert F. Kennedy Jr.’s efforts to spread misinformation about the safety of immunizations, according to a letter obtained by Bloomberg.

Recommended Video

Peter Marks, who was a key figure in Operation Warp Speed, stepped down from his position as the director of the FDA’s Center for Biologics Evaluation and Research, which is responsible for the safety and effectiveness of vaccines, along with gene therapies and blood products.

“I was willing to work to address the Secretary’s concerns regarding vaccine safety and transparency,” he said. “However it has become clear that truth and transparency are not desired by the Secretary, but rather he wishes subservient confirmation of his misinformation and lies.” 

Kennedy has openly questioned the safety of vaccines for years. Early in his tenure as health secretary, HHS has postponed and canceled meetings of outside vaccine experts, announced plans to study links between vaccines and autism and canceled funding to study vaccine hesitancy. 

Read More: RFK Jr.’s First Defeat on CDC Chief Tests Vaccine Agenda Limits

“The ongoing multistate measles outbreak that is particularly severe in Texas reminds us of what happens when confidence in well-established science underlying public health and well-being is undermined,” Marks said in his resignation letter Friday. “The vaccine very simply does not cause autism, nor is it associated with encephalitis or death.”

An HHS official said if Marks doesn’t want to get behind Kennedy’s push for transparency, he shouldn’t stay at the FDA. 

Marks said he didn’t agree with the direction of the new administration. 

“Undermining confidence in well-established vaccines that have met the high standards for quality, safety, and effectiveness that have been in place for decades at FDA is irresponsible, detrimental to public health, and a clear danger to our nation’s health, safety. and security,” he said in his letter.

HHS on Thursday announced mass layoffs of 10,000 employees across the federal agencies, which combined with buyout and early retirement programs will reduce the department’s workforce by around 25%. The agency said that employees who review drugs would not be laid off.

Marks, who resigned effective April 5, has been director of the center since 2016. 

The Wall Street Journal first reported Marks’ departure.

Subscribe to Fortune Gulf Brief. Every Tuesday, this new newsletter will deliver clear-eyed, authoritative intelligence on the deals, decisions, policies, and power shifts shaping one of the world’s most consequential regions, written for the people who need to act on it. Sign up here.
About the Authors
By Rachel Cohrs Zhang
See full bioRight Arrow Button Icon
By Bloomberg
See full bioRight Arrow Button Icon

Latest in Politics

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Politics

You’re probably safe from the Hantavirus outbreak, but here’s what you absolutely must not do, experts say
PoliticsCoronavirus
You’re probably safe from the Hantavirus outbreak, but here’s what you absolutely must not do, experts say
By Catherina GioinoMay 8, 2026
5 hours ago
kid on phone
Politicssmartphones and mobile devices
‘Close to zero’: Schools are spending tens of millions banning phones from classrooms, but test scores aren’t improving
By Jake AngeloMay 8, 2026
8 hours ago
Iran may have a higher tolerance for economic pain—but the pain is excruciating as regime reveals 100% inflation in just days on some items
EconomyIran
Iran may have a higher tolerance for economic pain—but the pain is excruciating as regime reveals 100% inflation in just days on some items
By Jason MaMay 8, 2026
9 hours ago
Ray Dalio: the ‘heart attack’ of America’s debt crisis is just the beginning of a ‘great turbulence’ that will reshape the country
Economynational debt
Ray Dalio: the ‘heart attack’ of America’s debt crisis is just the beginning of a ‘great turbulence’ that will reshape the country
By Nick LichtenbergMay 8, 2026
11 hours ago
eisenhower office
PoliticsDonald Trump
Trump wants to repaint a historic landmark. Preservationists say it will destroy it—and cost taxpayers $7.5m
By The Associated Press and Darlene SupervilleMay 8, 2026
12 hours ago
UFOs
North AmericaPentagon
Pentagon begins releasing new files on UFOs, telling public to draw their own conclusions
By Collin Binkley, Seung Min Kim and The Associated PressMay 8, 2026
13 hours ago

Most Popular

California farmers must destroy 420,000 peach trees after Del Monte closes its canneries and cancels more than $550 million in long-term contracts
North America
California farmers must destroy 420,000 peach trees after Del Monte closes its canneries and cancels more than $550 million in long-term contracts
By Sasha RogelbergMay 7, 2026
1 day ago
'Blue dot fever' plagues musicians like Post Malone, Meghan Trainor, and Zayn as a growing list of artists cancel tours due to lagging ticket sales
Arts & Entertainment
'Blue dot fever' plagues musicians like Post Malone, Meghan Trainor, and Zayn as a growing list of artists cancel tours due to lagging ticket sales
By Dave Lozo and Morning BrewMay 7, 2026
1 day ago
A Michigan farm town voted down plans for a giant OpenAI-Oracle data center. Weeks later, construction began
Magazine
A Michigan farm town voted down plans for a giant OpenAI-Oracle data center. Weeks later, construction began
By Sharon GoldmanMay 6, 2026
3 days ago
U.S. Treasury will have to borrow $2 trillion this year just to continue functioning—more than $166 billion every month
Economy
U.S. Treasury will have to borrow $2 trillion this year just to continue functioning—more than $166 billion every month
By Eleanor PringleMay 7, 2026
2 days ago
Airbnb CEO Brian Chesky warns two types of people won’t survive the AI era: ‘pure people managers’ and workers who resist change
Success
Airbnb CEO Brian Chesky warns two types of people won’t survive the AI era: ‘pure people managers’ and workers who resist change
By Emma BurleighMay 7, 2026
1 day ago
Auto-enrollment in Medicare Advantage isn't a nudge. It's a trap
Commentary
Auto-enrollment in Medicare Advantage isn't a nudge. It's a trap
By Brian KeyserMay 7, 2026
2 days ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.