Senator Johnson holds hearing on alleged federal suppression of COVID vaccine safety data.

Wisconsin Sen. Ron Johnson chaired a Senate hearing on June 3, 2026, alleging that federal health agencies deliberately hid COVID-19 vaccine safety data from the public. The hearing, titled "Plausible Mechanisms of COVID-19 Injections Causing Cancer and Attacks on Scientific Publications," brought together oncologists and researchers who say their work was suppressed or attacked, according to WGME.
Johnson claimed that over 39,000 deaths worldwide are linked to COVID-19 injections, according to KOMO News. Sen. Richard Blumenthal (D-CT) fired back, calling the hearing a "corruption of science" and defending the vaccines as a public health success.
Dr. Angus Dalgleish, a Professor Emeritus of Oncology at the University of London, told lawmakers that six of his long-stable melanoma patients suffered aggressive relapses after their third or later COVID-19 booster shot, according to KATU. He described the pattern as alarming and said he felt compelled to bring it before Congress.
Dr. Wafik El-Deiry of Brown University's Legorreta Cancer Center presented a review of 69 studies. The review identified possible safety signals for leukemia, lymphoma, and breast cancer. El-Deiry called the backlash against his research "academic terrorism," describing anonymous online campaigns aimed at destroying his reputation, according to CBS Austin.
On May 21, 2026, Johnson's office released an interim staff report titled "Unmasked: How Biden Health Officials Purposely Turned a Blind Eye Toward COVID-19 Vaccine Safety Signals." The report claims the FDA failed to use better data tools in 2021 that could have spotted injury signals — like Bell's Palsy and myocarditis — much sooner, according to ABC 3340.
The report alleges that senior FDA medical officer Dr. Ana Szarfman was sidelined after raising concerns about masking those adverse event signals. Johnson said "key agencies intentionally concealed critical information" from the American public, according to News 3 Las Vegas.
Sen. Blumenthal, the ranking member on the subcommittee, said the vaccines saved lives and that Republicans were "cherry-picking emails" to mislead the public. He argued the hearing fostered fear by relying on scientifically unsound anecdotes rather than peer-reviewed evidence, according to Turn to 10.
Public health advocates warn the hearing's impact could be severe. Support for school vaccine requirements has already dropped — from 82% of adults in 2019 to just 69% in 2025, according to Pew Research Center data cited by Fox San Antonio. Experts say that kind of erosion in trust could allow diseases like polio and diphtheria to return.
The hearing did not happen in a vacuum. HHS Secretary Robert F. Kennedy Jr. has spent 2025 and 2026 cutting vaccine funding and pushing to reduce childhood vaccine recommendations. A January 2026 KFF poll found that only 50% of adults trust the CDC or FDA — and just 37% trust Kennedy himself, according to WACH.
Critics say the administration is actively blocking research that shows vaccines work. A March 2026 CDC study showing the 2025–2026 COVID vaccine was 50% effective at preventing hospitalizations was reportedly suppressed, according to ABC News 4. Kennedy's allies counter that they are simply demanding more transparency and higher safety standards.
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