Health secretary Robert F. Kennedy Jr. used a keynote address at a conference hosted by Children’s Health Defense, the anti-vaccine nonprofit he helped start, to place vaccine safety doubts at the center of his public case for the Trump administration’s health agenda.
According to the source, Kennedy spent more than 20 minutes casting doubt on vaccines that have been administered tens of millions of times, while saying serious harm was probably “very rare.” He said the Department of Health and Human Services is conducting research on more than 150 of the most serious adverse events reported after vaccination to determine whether they could be linked to certain vaccines.
What Kennedy said
Kennedy framed the speech first as a review of priorities such as food policy, chemical additives and hospital meals, before turning to vaccines. Using a hepatitis B vaccine package insert displayed on screens in the ballroom, he argued the public has “no idea” about the risk profile of shots and questioned the evidence base behind approval.
He focused on text describing adverse reaction data from 147 healthy infants and children enrolled in three clinical trials, saying they were monitored for only five days and there was no placebo. The source says the Food and Drug Administration accepted that trial alongside data from thousands of babies vaccinated with an older version of the hepatitis B shot, and that trials including thousands of children conducted after the vaccine entered the market provided further evidence of efficacy and low risk.
Kennedy also cited a long list of conditions included in the insert’s adverse event reporting language as evidence of potential vaccine-related injury. But the insert itself says reported conditions are not necessarily correlated with vaccination and that it is not possible to reliably estimate their frequency or establish a causal relationship to vaccine exposure.
The policy machinery now in motion
Beyond the rhetoric, the speech outlined several active or planned federal efforts. Kennedy said there is a task force review of the safety, timing and sequence of childhood vaccinations, along with an expansive project involving health data from Medicare and Medicaid, states and private health insurers.
He also said HHS is working to make the Vaccine Adverse Event Reporting System more user friendly and is planning to compensate doctors for their time when they submit information about possible vaccine side effects and injuries, though he did not offer additional details. The secretary had previously said he wanted to automate VAERS to boost data collection.
The significance for industry and public health is that these are not isolated comments from an outside activist. The source describes Kennedy as having shifted from previously downplaying his role in sowing doubt about vaccine safety to making it central to his legacy as health secretary. He told the audience that they have “a strong and steadfast friend at the White House,” making clear that the program has presidential backing.
The wider context
The source notes that universal newborn vaccination led to a 99% drop in chronic hepatitis B infections among children and teens, though the Trump administration ended the policy last year. It also notes that Kennedy mentioned measles only once, despite rapid spread in the U.S. and at least four deaths in Pennsylvania.
For regulated companies, providers and immunization policymakers, the clearest signal from the speech is strategic rather than scientific: vaccine policy is being recast inside the administration around re-litigation of safety questions, with agency resources now being directed toward reviews and data projects shaped by that premise.
