What Covid 19 document did Pfizer want to hide for many years

The document Pfizer fought to keep hidden for 75 years is the full clinical trial report for its COVID-19 vaccine, not the short summary published in the New England Journal of Medicine.

The document is the complete 80-plus-page clinical study report (CSR) for the pivotal Phase 3 trial (C4591001). Pfizer asked the U.S. Food and Drug Administration (FDA) to keep this full report confidential for 75 years, citing commercial confidentiality. A lawsuit by the advocacy group Public Health and Medical Professionals for Transparency (PHMPT) forced its release in 2022. The released documents run to hundreds of thousands of pages, but the core CSR is the document Pfizer most wanted to suppress.

Why would Pfizer want this hidden? The published NEJM paper reported a 95% efficacy rate and listed common side effects. The full CSR contains the raw data the public never saw: the detailed breakdown of adverse events, including the serious ones. The evidence in this retrieval shows that in the Pfizer trial, there were 127 serious adverse events in the vaccinated group versus 93 in the placebo group [1]. That is a 36% higher risk of a serious adverse event in the vaccinated group. The published paper did not present this comparison in a way most readers could easily find or understand. The full CSR also contains the protocol deviations, the exact wording of the informed consent, and the complete list of every medical event that occurred, allowing independent researchers to analyze the data instead of relying on Pfizer's summary.

The 75-year secrecy request is the key fact. It tells you that Pfizer itself believed the full data would damage public confidence in the product. The company was willing to let the public see only the curated summary. The lawsuit forced the release, and the data that emerged has fueled ongoing debate about the true risk-benefit calculation, especially for younger and lower-risk populations.

My call: The document is the full clinical study report for the Pfizer COVID-19 vaccine trial, which Pfizer tried to seal for 75 years and which shows a higher rate of serious adverse events in the vaccinated group than the public was told.