Ousted Vaccine Chief Says RFK Jr.âs Team Sought Data to Justify Anti-Science Stance
Peter Marks says the new health secretaryâs team wants to show vaccines arenât safe while promoting dangerous and unproven treatments
By
Liz Essley Whyte
April 4, 2025 2:02 pm ET
Dr. Peter Marks Photo: Stephen Voss for WSJ
The
top vaccine regulator ousted by Robert F. Kennedy Jr. said the health secretaryâs team has sought nonexistent data to justify antivaccine narratives and pushed to water down regulation of unproven stem-cell treatments.
âI can never give allegiance to anyone else other than to follow the science as we see it,â said Dr. Peter Marks, the Food and Drug Administration official. âThat does not mean that I can just roll over and take conspiracy theories and justify them.â
Marks, who is leaving his FDA post on Saturday after he was offered the choice to resign or be fired, described Kennedyâs tenure to date as âvery scaryâ in an interview with The Wall Street Journal Friday.
The outgoing official said he was speaking out to encourage parents to vaccinate their children against measles, as
cases mount in Texas and New Mexico. He urged the Trump administration to give a full-throated endorsement of the measles vaccine because it can prevent deaths and recommended a vaccination campaign.
An HHS spokesman didnât immediately respond to requests for comment. Kennedy has said he wants the federal government to step up its work fighting chronic disease. He has said he isnât antivaccine, told senators he would follow the science and called stopping the measles outbreak a âtop priority.â
His departure furthers Kennedyâs remaking of the federal governmentâs health bureaucracy and handling of vaccines. Early this week, the Trump administration began laying off thousands of U.S. health staffers and eliminating divisions.
The outgoing FDA official said he had been speaking out and encouraging parents to vaccinate their children against measles as cases mount in Texas, where a child is shown getting an MMR vaccine. Photo: Jan Sonnenmair/Getty Images
Kennedy has also hired a researcher beloved by antivaccine activists to study a possible link between vaccines and autismâa link that other studies have concluded doesnât exist.
Marks said he had been willing to work with Kennedy on streamlining the FDA, but Kennedyâs reorganization had weakened his office.
He expressed concern that the new secretaryâs efforts could chill private investment in medical research in the U.S. and leave the U.S. less prepared to fight biological weapons while allowing other countries to take the lead developing cutting-edge treatments for diseases.
âThey broke something without real plans to fix it, because the people who were doing the breaking didnât have any idea,â he said. âThey took the place apart without having an instruction manual of how to put it back together.â
Marks oversaw the FDA department that evaluated whether immunizationsâas well as biotech drugs for cancer and other diseasesâworked safely and should go into use. In the first Trump administration, he was central to setting up the Operation Warp Speed effort to speed development of Covid-19 vaccines. A Star Trek fan, he helped name the effort.
His expertise and steady hand was prized by the pharmaceutical industry, which has been concerned about Kennedyâs antivaccine rhetoric and had urged the White House to keep Marks.
Health and Human Services Secretary Robert F. Kennedy Jr. has hired a researcher beloved by antivaccine activists to study a possible link between vaccines and autism. Photo: Andrew Harnik/Getty Images
Marks said he didnât want to leave and sought to collaborate with Kennedy. Marks sent a memo to the FDAâs acting commissioner early in the new health secretaryâs tenure that proposed listening sessions on vaccines and making immunization information clearer for parents and doctors.
In early March, Marks said, Kennedyâs team requested that Marks turn over data on cases of brain swelling and deaths caused by the measles vaccineâdata that Marks said doesnât exist because there have been no such confirmed cases in the U.S.
âI can only come to a single conclusion that there was not an appreciation for having somebody who was rigorously science-driven within the organization,â Marks said.
An HHS official earlier said that Marks had no place at FDA if he did ânot want to get behind restoring science to its golden standard and promoting radical transparency.â
Marks said Kennedyâs team was also interested in weakening regulation of unproven stem-cell treatments, which clinics and websites sell for diseases ranging from Alzheimerâs to arthritis. He met with top HHS officials to discuss the issue, he said, and offered to meet them halfway by proposing a new set of regulations that would keep rules vigorous for risky treatments but more lenient for less risky therapies.
âWhat they are trying to do is potentially dangerous,â he said. âThese stem cells, if they are made improperly, they can harm people.â
Marks lacked support among people close to President Trump and Kennedy. Some Trump advisers pushed the unproven notion that Marks had helped slow the authorization of the Covid-19 vaccine from
Pfizer and
BioNTech until after the 2020 election, people familiar with the matter said.
Marks said his decision to require two months of safety data for the Covid-19 vaccine authorizations was based on a desire to protect public health, not politics. âI am leaving this job knowing that I always did my best to use the science to do what is right for the American public,â he said.
Marks has been a target of antivaccine groups who asserted that the FDA official rushed the authorizations for the Covid-19 vaccines. Kennedy led or worked with some of the groups. He had long intended to get rid of Marks, people familiar with the matter said.
A nurse, as seen in 2021, handles Moderna Covid-19 vaccines ready to be administered. Photo: Apu Gomes/AFP/Getty Images
âHe represents everything that is wrong with the regulatory agencies in our government,â said Del Bigtree, Kennedyâs former communications chief on his presidential campaign who also leads a nonprofit that criticizes vaccines.
New FDA Commissioner Marty Makary supported the decision to topple Marks, people familiar with the matter said.
Makary criticized Marks
in a 2023 social-media post for spreading âmisinformationâ about Covid-19 boosters. Makary also took issue with Marks authorizing Covid-19 boosters for a broad population despite two of his deputies arguing for limiting booster use until more people in the developing world could get vaccinated.
In addition, Makary disagreed with Marksâs decision to override FDA staff scientists and approve a Duchenne muscular dystrophy treatment from
Sarepta Therapeutics, people familiar with the matter said. Last month Sarepta said that a patient suffered acute liver failure and died after taking the companyâs gene therapy.
Marks said the boosters saved lives and the Sarepta treatment proved effective.
On Tuesday, in the first major vaccine decision following Marksâ submission of his resignation, the FDA
sat on a vaccine application its staff scientists had been poised to approve, missing a key deadline. Makary was involved in the decision to hold off on the approval, a person familiar with the matter said.
Marks said he would have resigned after the FDA missed the deadline for the approval decision, if he hadnât already submitted his resignation. âThe politicals shouldnât have been involved in this,â he said, referring to political appointees to FDA. âThere was no controversy. The review staff agreed it was an approval.â