Health
Who Makes Vaccine Policy Decisions in RFK Jr.’s Health Department?
For decades, as an activist, Robert F. Kennedy Jr. resisted the scientific consensus that vaccines are safe and necessary to prevent serious disease. Now at the helm of the nation’s health department, he has begun to put his extreme views into practice, ousting veteran scientists and installing allies across the nation’s health agencies to enact major shifts in vaccine policy.
Some of Mr. Kennedy’s hires are activists who have worked for years alongside him. Others are scientists who say they broadly support vaccines but publicly criticized Covid shots or mandates during the pandemic. Many of these scientists have begun to question the safety or value of other shots, reflecting the views of Mr. Kennedy. The following account is based on previous statements made by these officials and on interviews with current and former health agency leaders.
F.D.A. chief medical and scientific officer
Critical of Covid boosters and shots for healthy kids
F.D.A. commissioner
Skeptical of certain vaccines
Dr. Vinay Prasad
Dr. Marty Makary
The agency’s new vaccine lead and chief medical officer, Dr. Vinay Prasad, has called himself an “extreme pro-vaccine person,” and Dr. Marty Makary, the agency’s commissioner, said last week that “we believe in vaccines.”
But the two officials, who sharply criticized vaccine mandates as academic researchers during the pandemic, have expressed doubts about the safety and necessity of Covid boosters for healthy children and adults. This summer, Dr. Prasad overrode some agency scientists who favored widespread access to Covid shots, narrowing the vaccine’s eligibility to those 65 and older and to younger people with underlying medical conditions.
Last week, Dr. Makary echoed the views of Mr. Kennedy when he publicly questioned the longstanding recommendation to give the hepatitis B vaccine at birth. That shot is credited with nearly eliminating the transmission of the disease from mother to infant.
Dr. Prasad replaced a veteran at the agency, Dr. Peter Marks, who resigned in March and said that Mr. Kennedy’s aggressive stance on vaccines posed a danger to the public.
In June, Mr. Kennedy fired all 17 members of a powerful C.D.C. expert panel, the Advisory Committee on Immunization Practices. Insurance companies and government programs like Medicaid are required to cover the vaccinations that the panel recommends.
Mr. Kennedy handpicked eight new members that month, half of whom had expressed skepticism of vaccines at some point. (One has since stepped down.) Others have little expertise in immunology or vaccines.
On Monday, Mr. Kennedy appointed five more members, just days before the group meets to review recommendations for multiple vaccines. Some of the newly selected members have been critical of Covid vaccines or vaccine mandates.
Dr. Robert Malone is a controversial figure. He performed early experiments using mRNA in the 1980s but gained notoriety during the pandemic for claiming that Covid vaccines were unsafe, contradicting volumes of studies.
Martin Kulldorff, a biostatistician, has been generally supportive of vaccines but opposed Covid vaccination for children and vaccine mandates. Vicky Pebsworth, a nurse with a doctorate in public health, serves on the board of the National Vaccine Information Center, a nonprofit that disseminates misinformation about the risks of vaccination.
Dr. Malone and Dr. Kulldorff have served as paid expert witnesses in legal cases against vaccine makers. Dr. Pebsworth claimed in a lawsuit that a survey of families of unvaccinated children supported a hypothesis that a rise in the number of recommended childhood vaccines explained an epidemic of chronic disease.
Another panel member, Retsef Levi, is a management and health analytics expert at the Massachusetts Institute of Technology. He has been critical of a variety of vaccines and has called for Covid vaccines to be pulled from the market.
Dr. Evelyn Griffin, an obstetrician and gynecologist, questioned the safety and effectiveness of Covid vaccines in a hearing in the Louisiana House of Representatives in 2021. Dr. Kirk Milhoan, a pediatric cardiologist, questioned the safety and effectiveness of Covid vaccines at a 2024 event led by Representative Marjorie Taylor Greene, Republican of Georgia. Catherine M. Stein is an epidemiology professor who in 2022 called for an end to Covid vaccine mandates at universities.
Dr. Cody Meissner is a professor of pediatrics who opposed vaccine mandates and has questioned the ongoing need for Covid vaccines for children and pregnant women. He previously served on the advisory committee and is widely considered to be the most qualified member.
The others are not known to have spoken out against vaccines. They are Dr. Joseph R. Hibbeln, a nutritional neuroscientist; Dr. James Pagano, an emergency medicine physician; Hillary Blackburn, a pharmacist; and Dr. Raymond Pollak, a surgeon and transplant specialist.
The C.D.C. director has the power to accept or reject the immunization committee’s recommendations. The current acting director is Mr. Kennedy’s deputy at the Department of Health and Human Services, Jim O’Neill, a former biotechnology executive. The previous director, Susan Monarez, said she was forced out because she would not agree to accept the newly re-formed committee’s recommendations.
A special adviser to the C.D.C. director, Stuart Burns, is a critical player driving the health secretary’s agenda at the agency. Mr. Burns has been quietly working to remake the immunization committee and its agenda.
Mr. Burns is not a scientist but he worked for decades as a staff member for Republican congressmen known for their vaccine skepticism. One is Dr. Dave Weldon, a former representative from Florida who was also Mr. Kennedy’s original choice for C.D.C. director. The White House withdrew Dr. Weldon’s nomination just hours before his confirmation hearing because some Senate Republicans were concerned about his stance on vaccines.
Mr. Burns works closely with three other Kennedy hires who serve H.H.S. but also work closely with the C.D.C. Dr. Reyn Archer is a former Texas health commissioner who has questioned the safety and value of the Covid vaccine on social media. He serves as a liaison between the health secretary’s office and the C.D.C., and has been helping Mr. Burns to develop and guide the immunization committee.
David Geier is a steadfast figure in the anti-vaccine movement who has spent more than 20 years trying to establish a link between vaccines and autism, despite scientific consensus that there is none. Mr. Geier, who is listed as a senior data analyst in the H.H.S. directory, was given access to federal data on post-vaccination side effects and is using it to continue his studies on autism.
Lyn Redwood is a nurse practitioner and the former head of Children’s Health Defense, the anti-vaccine group founded by Mr. Kennedy. Since the early 2000s, Ms. Redwood has criticized the use of mercury as a preservative in vaccines. She has said she believes the ingredient is linked to her son’s autism.
Now listed as an expert at H.H.S., Ms. Redwood gave a presentation in June to the immunization committee, a role usually reserved for C.D.C. scientists. She said that the mercury preservative in vaccines, known as thimerosal, was toxic to children, even though dozens of studies have shown it is harmless in this form. The panel later voted to stop recommending the already limited number of flu vaccines that contained the preservative.
Principal deputy director of the N.I.H.
Skeptical of certain vaccines
N.I.H. director
Critical of Covid vaccine mandates
Dr. Matthew Memoli
Dr. Jay Bhattacharya
Dr. Matthew Memoli is a veteran infectious disease scientist at the National Institutes of Health who now serves as its principal deputy director. As a senior researcher under Dr. Anthony Fauci during the pandemic, Dr. Memoli opposed Covid vaccine mandates and declined to get a shot himself.
Since becoming a leader of the research agency, Dr. Memoli has downplayed the value of vaccines for certain respiratory diseases, according to the whistle-blower complaints of two prominent scientists.
Dr. Jay Bhattacharya, the N.I.H director, sharply criticized vaccine mandates as an academic researcher during the pandemic. He co-wrote an anti-lockdown treatise in 2020 with Dr. Kulldorff, one of Mr. Kennedy’s selections for the C.D.C. immunization committee.
During his confirmation hearing in March, Dr. Bhattacharya reiterated his support for childhood vaccinations for diseases like measles. He also said he was “convinced” vaccines did not cause autism, even as he urged more research on the question, which scientists say has long been settled.
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In a dramatic turn of events that’s captured the attention of animal lovers worldwide, Punch — the young macaque at a zoo in Japan famous for his inseparable bond with a stuffed orangutan toy — has reached a major milestone in his journey toward social integration.
On Thursday, visitors and staff at the Ichikawa Zoological and Botanical Garden witnessed a breakthrough: Punch was seen cuddling with and hitching a ride on the back of a fellow macaque.
Punch’s story began with hardship. He was abandoned by his mother shortly after his birth in July 2025 — and to ensure his survival, zookeepers stepped in to hand-rear the primate.
On Jan. 19, 2026, the zoo officially began the process of reintegrating Punch into the “monkey mountain” enclosure.
The transition was initially fraught with tension.
Punch’s story began with hardship when he was abandoned by his mother shortly after he was born. To help him, zookeepers gave him a stuffed toy that he began dragging around everywhere he went. (David Mareuil/Anadolu via Getty Images)
As a hand-reared infant, Punch was bullied and ignored by the established group of monkeys.
He was often seen huddled alone with his orange plush companion while the rest of the troop interacted.
BABY MONKEY CARRIES FAITHFUL STUFFED COMPANION EVERYWHERE HE GOES, DRAWING CROWDS AT ZOO
In an official statement released Feb. 27, the Ichikawa Zoological and Botanical Garden detailed the meticulous care behind this process.
Previous viral videos showed Punch bullied by the rest of the troop, running to his plushy toy for comfort. (David Mareuil/Anadolu via Getty Images)
“From an animal welfare perspective, our primary goal is to reintegrate Punch with the troop,” the zoo said.
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The strategy involved nursing Punch within the enclosure, so the troop could recognize him as one of their own, and pairing him with a gentle young female macaque prior to his full release to build his confidence.
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The latest footage, captured by X user @tate_gf, suggested the zoo’s patience is paying off.
The video shows Punch seeking physical contact not from his toy, but from another monkey — eventually climbing onto its back for a vital social behavior for young macaques: the “piggyback ride.”
The zoo’s strategy appears to be paying off: Punch, shown at far left, was recently seen riding on the back of a fellow macaque. (David Mareuil/Anadolu via Getty Images)
While Punch still carries his stuffed toy for comfort during moments of perceived danger, the zoo remains optimistic about his progress.
The organization cited the successful 2009 case of Otome, another hand-reared macaque who eventually outgrew her stuffed toy, successfully integrated — and went on to raise four offspring of her own.
The zoo has had crowds coming to see Punch, with hundreds of people lining up to get inside to see the young star, according to reports.
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“I’m hoping Punch has a good life like everybody else does, and think he’s a cute little guy,” one person commented online.
“Such a precious baby,” another person wrote.
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This story discusses suicide. If you or someone you know is having thoughts of suicide, please contact the Suicide & Crisis Lifeline at 988 or 1-800-273-TALK (8255).
Artificial intelligence has been touted as a boon to healthcare, but a new study has revealed its potential shortcomings when it comes to giving medical advice.
In January, OpenAI launched ChatGPT Health, the medical-focused version of the popular chatbot tool.
The company introduced the tool as “a dedicated experience that securely brings your health information and ChatGPT’s intelligence together, to help you feel more informed, prepared and confident navigating your health.”
But researchers at the Icahn School of Medicine at Mount Sinai have found that the tool failed to recommend emergency care for a “significant number” of serious medical cases.
The study, published in the journal Nature Medicine on Feb. 23, aimed to explore how ChatGPT Health — which is reported to have about 40 million users daily — handles situations where people are asking whether to seek emergency care.
Artificial intelligence has been touted as a boon to healthcare, but a new study has revealed its potential shortcomings when it comes to giving medical advice. (iStock)
“Right now, no independent body evaluates these products before they reach the public,” lead author Ashwin Ramaswamy, M.D., instructor of urology at the Icahn School of Medicine at Mount Sinai in New York City, told Fox News Digital.
“We wouldn’t accept that for a medication or a medical device, and we shouldn’t accept it for a product that tens of millions of people are using to make health decisions.”
Emergency scenarios
The team created 60 clinical scenarios across 21 medical specialties, ranging from minor conditions to true medical emergencies.
Three independent physicians then assigned an appropriate level of urgency for each case, based on published clinical practice guidelines in 56 medical societies.
WOMAN SAYS CHATGPT SAVED HER LIFE BY HELPING DETECT CANCER, WHICH DOCTORS MISSED
The researchers conducted 960 interactions with ChatGPT Health to see how the tool responded, taking into account gender, race, barriers to care and “social dynamics.”
While “clear-cut emergencies” — such as stroke or severe allergy — were generally handled well, the researchers found that the tool “under-triaged” many urgent medical issues.
The team created 60 clinical scenarios across 21 medical specialties, ranging from minor conditions to true medical emergencies. (iStock)
For example, in one asthma scenario, the system acknowledged that the patient was showing early signs of respiratory failure — but still recommended waiting instead of seeking emergency care.
“ChatGPT Health performs well in medium-severity cases, but fails at both ends of the spectrum — the cases where getting it right matters most,” Ramaswamy told Fox News Digital. “It under-triaged over half of genuine emergencies and over-triaged roughly two-thirds of mild cases that clinical guidelines say should be managed at home.”
PARENTS FILE LAWSUIT ALLEGING CHATGPT HELPED THEIR TEENAGE SON PLAN SUICIDE
Under-triage can be life-threatening, the doctor noted, while over-triage can overwhelm emergency departments and delay care for those in real need.
Researchers also identified inconsistencies in suicide risk alerts. In some cases, it directed users to the 988 Suicide and Crisis Lifeline in lower-risk scenarios, and in others, it failed to offer that recommendation even when a person discussed suicidal ideations.
“ChatGPT Health performs well in medium-severity cases, but fails at both ends of the spectrum.”
“The suicide guardrail failure was the most alarming,” study co-author Girish N. Nadkarni, M.D., chief AI officer of the Mount Sinai Health System, told Fox News Digital.
ChatGPT Health is designed to show a crisis intervention banner when someone describes thoughts of self-harm, the researcher noted.
OpenAI launched ChatGPT Health, the medical-focused version of the popular chatbot tool, in January 2026. (Gabby Jones/Bloomberg via Getty Images)
“We tested it with a 27-year-old patient who said he’d been thinking about taking a lot of pills,” Nadkarni said. “When he described his symptoms alone, the banner appeared 100% of the time. Then we added normal lab results — same patient, same words, same severity — and the banner vanished.”
“A safety feature that works perfectly in one context and completely fails in a nearly identical context … is a fundamental safety problem.”
CHATGPT HEALTH PROMISES PRIVACY FOR HEALTH CONVERSATIONS
The researchers were also surprised by the social influence aspect.
“When a family member in the scenario said ‘it’s nothing serious’ — which happens all the time in real life — the system became nearly 12 times more likely to downplay the patient’s symptoms,” Nadkarni said. “Everyone has a spouse or parent who tells them they’re overreacting. The AI shouldn’t be agreeing with them during a potential emergency.”
Fox News Digital reached out to Open AI, creator of ChatGPT, requesting comment.
Physicians react
Dr. Marc Siegel, Fox News senior medical analyst, called the new study “important.”
“It underlines the principle that while large language models can triage clear-cut emergencies, they have much more trouble with nuanced situations,” Siegel, who was not involved in the study, told Fox News Digital.
ChatGPT and other LLMs can be helpful tools, a doctor said, but they “should not be used to give medical direction.” (iStock)
“This is where doctors and clinical judgment come in — knowing the nuances of a patient’s history and how they report symptoms and their approach to health.”
ChatGPT and other LLMs can be helpful tools, Siegel said, but they “should not be used to give medical direction.”
“Machine learning and continued input of data can help, but will never compensate for the essential problem – human judgment is needed to decide whether something is a true emergency or not.”
BREAKTHROUGH BLOOD TEST COULD SPOT DOZENS OF CANCERS BEFORE SYMPTOMS APPEAR
Dr. Harvey Castro, an emergency physician and AI expert in Texas, echoed the importance of the study, calling it “exactly the kind of independent safety evaluation we need.”
“Innovation moves fast. Oversight has to move just as fast,” Castro, who also did not work on the study, told Fox News Digital. “In healthcare, the most dangerous mistakes happen at the extremes, when something looks mild but is actually catastrophic. That’s where clinical judgment matters most, and where AI must be stress-tested.”
Study limitations
The researchers acknowledged some potential limitations in the study design.
“We used physician-written clinical scenarios rather than real patient conversations, and we tested at a single point in time — these systems update frequently, so performance may change,” Ramaswamy told Fox News Digital.
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Additionally, most of the missed emergencies happened in situations where the danger depended on how the condition was changing over time. It’s not clear whether the same problem would happen with acute medical emergencies.
Because the system had to choose just one fixed urgency category, the test may not reflect the more nuanced advice it might give in a back-and-forth conversation, the researchers noted.
ChatGPT Health is designed to show a crisis intervention banner when someone describes thoughts of self-harm. (iStock)
Also, the study wasn’t large enough to confidently detect small differences in how recommendations might vary by race or gender.
“We need continuous auditing, not one-time studies,” Castro noted. “These systems update frequently, so evaluation must be ongoing.”
‘Don’t wait’
The researchers emphasized the importance of seeking immediate care for serious issues.
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“If something feels seriously wrong — chest pain, difficulty breathing, a severe allergic reaction, thoughts of self-harm — go to the emergency department or call 988,” Ramaswamy advised. “Don’t wait for an AI to tell you it’s OK.”
The researchers noted that they support the use of AI to improve healthcare access, and that they didn’t conduct the study to “tear down the technology.”
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“These tools can be genuinely useful for the right things — understanding a diagnosis you’ve already received, looking up what your medications do and their side effects, or getting answers to questions that didn’t get fully addressed in a short doctor’s visit,” Ramaswamy said.
“That’s a very different use case from deciding whether you need emergency care. Treat them as a complement to your doctor, not a replacement.”
“This study doesn’t mean we abandon AI in healthcare.”
Castro agreed that the benefits of AI health tools should be weighed against the risks.
“AI health tools can increase access, reduce unnecessary visits and empower patients with information,” he said. “They are not inherently unsafe, but they are not yet substitutes for clinical judgment.”
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“This study doesn’t mean we abandon AI in healthcare,” he went on. “It means we mature it. Independent testing and stronger guardrails will determine whether AI becomes a safety net or a liability.”
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