Pfizer Quietly Studied Myocarditis in Children a Month Before FDA Authorized COVID Shots for Kids Ages 5-11


by Brenda Baletti, Ph.D., Childrens Health Defense:

While the Centers for Disease Control and Prevention was promoting the COVID-19 vaccine as “safe and effective” for children and teens, Pfizer was studying whether and how much it damaged their hearts, according to a DailyClout report on internal Pfizer documents.


The documents show that Pfizer conducted a “Phase 2/3 Study” in Europe, during which it vaccinated and collected blood samples from children ages 5-11 and 12-15 and tested them for troponin I.

Troponin I, a protein released into the bloodstream when the heart is damaged, is an indicator of subclinical myocarditis.

Pfizer began the study in September 2021, the month before the U.S. Food and Drug Administration (FDA) granted Pfizer emergency use authorization (EUA) for its COVID-19 vaccine for children ages 5-11.

The FDA said it based the EUA on the agency’s “thorough and transparent evaluation of the data” that found “no serious side effects.”

However, Pfizer’s ongoing active surveillance and testing for troponin 1 was an acknowledgment of the undisclosed risk of vaccine-induced myocarditis and pericarditis, according to Dr. Christopher Flowers, who wrote the report on the Pfizer documents for DailyClout.

Neither Pfizer nor the FDA made the results of the vaccine maker’s study available to the public, Flowers told The Defender.

Flowers, a retired academic radiologist with 40-plus years of clinical experience, has been sifting through the documents Pfizer provided the FDA in its EUA application since the FDA began releasing the documents in 2022 under a court order.

He has focused specifically on evidence of myocarditis among young people.

He said it is particularly worrying that Pfizer was testing young children for markers of subclinical myocarditis because they are not typically an age group at risk for the condition.

“If they were concerned about it, and at the same time they were telling everyone it was safe to use, well, the left hand is doing something different to what the right hand is doing,” he said.

Flowers said it is even more concerning that the outcomes haven’t been made public. Because if young children do have higher troponin 1 levels post-vaccination, it would be another indicator they should not take the vaccine.

“We have found that a lot of these children’s trials were dropped. On the website [where clinical trials are registered], a number of the proposed trials Pfizer told the FDA they were going to do disappeared off the site, which means they are not taking place” he added.

“So we have concerns that they knew something was going on, but we don’t have the data. We want truth, we want transparency. That’s what drove me to write this report.”

Flowers’ report is part of the DailyClout and War Room Project to analyze the 450,000 pages of Pfizer’s records on its mRNA COVID-19 vaccine — records the drugmaker tried unsuccessfully to keep private for 75 years.

Flowers heads up thousands of volunteer scientists, doctors, nurses, attorneys and others at the project who have been reviewing the documents, submitting related Freedom of Information Act (FOIA) requests and issuing investigative reports.

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