New documents obtained by Sen. Ron Johnson reveal that the Biden White House and HHS failed to immediately warn the public when vaccine safety surveillance systems detected statistically significant safety signals for ischemic stroke in adults 65 and older who received Pfizer’s COVID-19 booster vaccine.
New documents obtained by Sen. Ron Johnson (R-Wis.) add to existing evidence that health officials under the Biden administration downplayed COVID-19 vaccine safety risks and delayed warning the public.
“The records provide further evidence of the Biden administration’s awareness of and willingness to downplay the significant safety risks associated with the COVID-19 vaccines,” Johnson told The Defender.
The nearly 2,000 pages of documents reveal that in November 2022, officials at the White House and U.S. Department of Health and Human Services (HHS) failed to immediately warn the public when vaccine safety surveillance systems detected statistically significant safety signals for ischemic stroke in adults 65 and older who received Pfizer’s COVID-19 booster vaccine.
An ischemic stroke, which can be fatal, happens when a blood clot blocks blood flow to the brain, according to the Cleveland Clinic.
Meanwhile, in 2022 and 2023, federal health officials continued to promote the COVID-19 vaccines as safe and effective.
“As safety signals for ischemic stroke appeared, Biden HHS officials continued to urge people to get vaccinated, jeopardizing the health of millions of Americans,” Johnson said.
Documents show over 200 stroke cases in less than a year
The newly released documents are just a fraction of what Johnson has received since January 2025, when he subpoenaed HHS for COVID-19 vaccine safety records and communications about the COVID-19 pandemic.
“I am sharing my preliminary findings to provide HHS and the public with even more evidence of the Biden administration’s unsupported and unyielding devotion to a harmful vaccine at the expense of the public’s health,” Johnson wrote in a March 23 letter to HHS Secretary Robert F. Kennedy Jr.
Johnson included a detailed timeline of findings from the documents.
According to the timeline, the Vaccine Safety Datalink, run by the CDC and healthcare organizations, first detected a safety signal for ischemic stroke on Nov. 27, 2022, and continued to show a signal for months.
In late December 2022, CDC officials reviewed 53 reports in the Vaccine Adverse Event Reporting System (VAERS) of ischemic stroke, including three deaths, following Pfizer’s COVID-19 vaccine.
In January 2023, CDC officials identified over 60 more VAERS reports of ischemic stroke following Pfizer’s COVID-19 vaccine. By February 7, 2023, officials had counted roughly 226 stroke cases in VAERS since August 31, 2022.
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