Senate Report: Biden Administration Delayed Public Warning on Myocarditis Risks Tied to COVID

Senate investigators say U.S. health agencies ignored early warnings, withheld key data, and prioritized vaccine rollout over transparency about heart inflammation risks.

WASHINGTON — A newly released interim report from the Senate’s Permanent Subcommittee on Investigations accuses the Biden administration of deliberately delaying public warnings about the risk of myocarditis—a type of heart inflammation—linked to mRNA COVID-19 vaccines.

The report, spearheaded by Sen. Ron Johnson, R-Wis., and released Wednesday, outlines what it describes as a series of failures by the Centers for Disease Control and Prevention (CDC), the Food and Drug Administration (FDA), and the Department of Health and Human Services (HHS) to promptly alert the public about vaccine-related adverse events, especially affecting young people.

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The 47-page report alleges that U.S. health officials knew of potential heart inflammation cases as early as February 2021 and that Israeli health authorities even notified the CDC that they were seeing increased reports of myocarditis in young people after receiving the Pfizer vaccine. Internal communications showed CDC officials discussing a formal Health Alert Network (HAN) warning as early as May 2021 but ultimately decided not to issue one—reportedly due to concerns over public alarm and pressure from the FDA.

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Instead, the CDC published “clinical considerations” on its website, downplaying the frequency and severity of myocarditis reports. Drafts of the abandoned HAN warning, obtained through subpoena, reveal that health officials had considered advising doctors to restrict young patients with myocarditis from strenuous activity for at least three months—a recommendation that was later removed.

The report also raises concerns over the CDC’s communication with Pfizer and Moderna. It reveals that company representatives were given advance notice about internal agency decisions regarding adverse event warnings—before the public was informed.

Click here for all the supporting documents from the U.S. Senate.

Unredacted documents obtained by the subcommittee show the Biden administration heavily redacted FOIA documents that revealed public health officials sought data on deaths after vaccination and had specific interest in foreign reporting on adverse events. Critics say the redactions shielded potentially damaging information from the public.

Additionally, the report highlights flaws in the federal government’s vaccine monitoring systems. A Defense Health Agency consultant warned in April 2021 that the V-safe app, a CDC tool used to track vaccine safety, lacked the ability to detect cardiac-related symptoms adequately. Despite this, the CDC did not modify V-safe’s survey to include such symptoms.

The FDA ultimately updated labeling for the Pfizer and Moderna vaccines on June 25, 2021, adding a warning about the potential risk of myocarditis and pericarditis, particularly among younger males.

Sen. Johnson called the findings “a disturbing example of how federal agencies prioritized public relations over transparency and public health.” HHS is still in the process of producing additional documents as required by a January 2025 subpoena.

The CDC and FDA have not yet commented on the report’s allegations.