
In September 2025, U.S. Health Secretary Robert F. Kennedy Jr. faced intense bipartisan questioning about his COVID-19 policies and past anti-vaccine rhetoric in a Senate committee hearing. The hearing followed Kennedy's announcement in May that the CDC would no longer recommend COVID vaccines for pregnant women or healthy children. Kennedy's decision was based on a Department of Health and Human Services document that many experts labeled as junk science. The Senate Finance Committee hearing saw Democratic senators clash with Kennedy over his actions around vaccines, while some Republican senators also expressed unease with his changes to COVID-19 policies.
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What You'll Learn

Robert F. Kennedy Jr.'s anti-vaccine stance
In September 2025, Robert F. Kennedy Jr., the Secretary of Health and Human Services, faced bipartisan questioning during a Senate committee hearing regarding his COVID-19 vaccine stance. Kennedy, who had a history of anti-vaccine activism, defended his efforts to withdraw COVID-19 vaccine recommendations and the turmoil he caused within federal health agencies.
Kennedy's anti-vaccine stance was evident in his decision to remove the Centers for Disease Control and Prevention's (CDC) recommendation for COVID-19 vaccines for pregnant women and healthy children, disregarding the agency's formal process for vaccine schedule adjustments. He also attacked the safety and continued use of mRNA COVID-19 vaccines, despite praising President Donald Trump's initiative to rapidly develop them.
During the hearing, Kennedy stood by his past anti-vaccine rhetoric and disputed reports of people facing difficulties in obtaining COVID-19 vaccines. He was criticized for filling a vaccine advisory panel with skeptics and conspiracy theorists, leading to concerns about the spread of misinformation and the potential impact on vaccine-preventable diseases.
Kennedy's actions and statements sparked outrage among medical groups and Democratic senators, with some calling for his resignation. Kennedy's family members also joined the calls for his resignation, stating that he posed a "threat to the health and wellbeing of every American."
In summary, Robert F. Kennedy Jr.'s anti-vaccine stance was evident in his efforts to undermine COVID-19 vaccine recommendations, his criticism of vaccine safety, and his dismissal of scientific processes. His actions caused turmoil within federal health agencies and raised concerns about the potential impact on public health.
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Kennedy's defence of COVID-19 policies
In September 2025, Robert F. Kennedy Jr., the US Health Secretary, faced bipartisan questioning during a Senate committee hearing regarding his COVID-19 policies and vaccine stance. Kennedy, a longtime anti-vaccine activist, defended his efforts to withdraw COVID-19 vaccine recommendations and his controversial actions in federal health agencies.
Kennedy's defence centred on several arguments. Firstly, he criticised the CDC's recommendations during the pandemic, including lockdowns and masking policies, claiming they "failed to do anything about the disease itself". He asserted that those who oversaw these policies deserved to be fired for their inadequate response to chronic diseases.
Secondly, Kennedy stood by his past anti-vaccine rhetoric and disputed reports of people facing difficulties in accessing COVID-19 vaccines. He claimed that anyone could get the COVID-19 booster and that he was not taking them away. However, he faced criticism from senators for narrowing eligibility criteria and creating regulatory confusion, making it harder for some Americans to receive vaccinations.
Thirdly, Kennedy addressed the firing of Susan Monarez, the CDC director. He claimed she was untrustworthy and had lied about the reasons for her dismissal. He denied Monarez's account, stating that he asked her to resign because she said she was not a trustworthy person.
Additionally, Kennedy defended his decision to disband a panel of experts advising the government on vaccine policy and replace them with a hand-picked group, including several vaccine skeptics. He argued that the previous panel was filled with people expressing anti-vaccine rhetoric. However, this move was met with concern, as Kennedy's appointees had biases against vaccines and mandates, potentially influencing the committee's recommendations.
Lastly, Kennedy maintained his support for President Donald Trump's Operation Warp Speed initiative, which aimed to rapidly develop mRNA COVID-19 vaccines. He asserted that Trump deserved a Nobel Prize for this effort, despite also criticising the safety and continued use of these vaccines.
Kennedy's defence of his COVID-19 policies and vaccine stance was met with mixed reactions. While Trump expressed support for Kennedy, acknowledging their differing views, medical groups and Democratic senators called for Kennedy's resignation or firing. They criticised his disregard for scientific evidence, spread of misinformation, and potential harm to public health.
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Medical groups call for Kennedy's resignation
Health and Human Services Secretary Robert F. Kennedy Jr. faced tough bipartisan questioning about his COVID-19 policies and his stance on vaccines in a Senate committee hearing on Thursday, September 4, 2025.
Kennedy, a longtime leader in the anti-vaccine movement, has made sweeping changes to agencies tasked with public health policy and scientific research by laying off thousands of workers, firing science advisors, and remaking vaccine guidelines. These moves have rattled medical groups and officials in several Democratic-led states, with many medical groups and Democrats in Congress calling for Kennedy's resignation or firing.
The Senate Finance Committee called Kennedy to a hearing about his plans to "'Make America Healthy Again.'" However, Democratic senators pressed Kennedy on his actions around vaccines, with Sen. Ron Wyden of Oregon attempting to have Kennedy formally sworn in as a witness, citing the HHS secretary's history of lying to the committee. Wyden accused Kennedy of putting children in harm's way through his policies, arguing that Kennedy has shown no regrets about removing scientists and doctors from the decision-making process and allowing conspiracy theories to dictate health policy.
The document the Department of Health and Human Services sent to lawmakers to support Kennedy's decision to change U.S. policy on COVID vaccines has been criticized as "willful medical disinformation." It cites scientific studies that are unpublished or under dispute and mischaracterizes others. Kennedy's announcement that the CDC would no longer recommend COVID vaccines for pregnant women or healthy children has been met with outrage by many pediatricians and scientists.
Kennedy's critics point to his firing of CDC director Susan Monarez, who wrote that Kennedy was trying to weaken public health protections. In addition to Monarez, several top CDC leaders resigned in protest, leaving the agency in turmoil. Kennedy's refusal to acknowledge the data showing that the COVID-19 vaccine has saved lives and his disparagement of the shot have caused consternation among President Trump and some of his aides, despite Trump's public support for Kennedy's "different take" on health issues.
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Kennedy's HHS sent Congress 'junk science'
In June 2025, Health Secretary Robert F. Kennedy Jr. was accused of sending Congress a document containing "junk science" to defend his decision to change the COVID-19 vaccine schedule. The document, titled "Covid Recommendation FAQ," was sent to members of Congress who questioned the science and process behind Kennedy's move. It has not been posted on the HHS website.
According to medical experts, the document distorts some legitimate studies and cites others that are disputed and unpublished. For example, it includes a preprint that has not been peer-reviewed and is accompanied by a warning that it "should not be used to guide clinical practice." The FAQ also claims that "post-marketing studies" of COVID-19 vaccines have identified "serious adverse effects," such as an increased risk of myocarditis and pericarditis, conditions involving inflammation of the heart.
C.J. Young, deputy communications director for the House Energy and Commerce Committee, confirmed that Democratic staff members of the committee received the document from HHS. He stated that similar documents in the past would typically clarify the justification and scope of an administration's policy change and could be assumed to be scientifically accurate. However, he expressed concern about the level of "sloppiness," "inattention to detail," and "lack of consideration for scientific merit" in this particular document.
Neil Silverman, a professor of clinical obstetrics and gynecology, warned that members of Congress who are physicians might not take the time to check the references in the paper and would assume its scientific validity. He stated that these members of Congress, along with everyone else who has accessed the document, are being "hoodwinked."
In response to the accusations, HHS Director of Communications Andrew Nixon defended the document, stating, "There is no distortion of the studies in this document. The underlying data speaks for itself, and it raises legitimate safety concerns. HHS will not ignore that evidence or downplay it. We will follow the data and the science."
The controversy surrounding Kennedy's HHS and his handling of vaccine-related issues led to bipartisan criticism and calls for his resignation from members of his own family, including Kerry Kennedy and Joseph P. Kennedy III. Kennedy faced a contentious Senate hearing in September 2025, where he was questioned about his leadership of federal health agencies, his efforts to pull back COVID-19 vaccine recommendations, and his firing of high-level officials at the CDC. During the hearing, Kennedy doubled down on false claims about vaccines and clashed with senators over his changes to immunization policies and federal health agencies.
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Kennedy's hearing before the Senate Finance Committee
On September 4, 2025, Robert F. Kennedy Jr., the US Health Secretary, appeared before the Senate Finance Committee. The hearing was marked by partisan clashes and Kennedy's defence of his COVID-19 policies and vaccine stance. Kennedy, a longtime anti-vaccine activist, had made sweeping changes to public health agencies, including laying off workers, firing science advisors, and altering vaccine guidelines.
The hearing began with Democratic Senator Ron Wyden accusing Kennedy of promoting conspiracy theorists and "elevating crackpots". Kennedy responded by criticising the Centers for Disease Control and Prevention (CDC), stating that they “failed miserably” during the COVID-19 pandemic. He also claimed that the US was the "sickest country in the world". When questioned about the COVID-19 death toll in the US, Kennedy stated that he did not know how many had died and cast doubt on the available data.
Kennedy faced tough bipartisan questioning, including from some Republican senators who challenged his vaccine skepticism and policy changes. Senator Bernie Sanders asked Kennedy if he accepted that the COVID-19 vaccine was a "miracle", to which Kennedy eventually conceded that it had saved "quite a few" lives. Kennedy also faced criticism for his recent firing of the CDC director, Susan Monarez, and other top CDC leaders.
The hearing devolved into a partisan exchange, with Democrats calling for Kennedy's resignation and accusing him of being a danger to public health. Kennedy, in turn, accused Senator Maggie Hassan of "making stuff up" and called Ben Ray Luján "ridiculous". The exchanges with Democratic senators were described as “raucous", with shouting from both sides.
Kennedy's appearance before the Senate Finance Committee highlighted the controversy surrounding his COVID-19 policies and vaccine stance, with some senators expressing concern over his actions and their potential impact on public health.
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