Massive study confirms pfizer vaccine effectiveness using millions of health records
NCT ID NCT06199934
First seen Nov 01, 2025 · Last updated May 16, 2026 · Updated 29 times
Summary
This study looked at nearly 20 million health records to see how well different versions of the Pfizer-BioNTech COVID-19 vaccine prevent severe illness, hospital visits, and death. Researchers used existing data from state vaccine registries and insurance claims, so no new participants were enrolled. The goal was to understand the vaccine's real-world effectiveness in California and Louisiana residents.
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Locations
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Pfizer Global Headquarters
New York, New York, 10001, United States
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