Some of the first commercially available doses of Pfizer-BioNTech COVID-19 vaccine had lower levels of intact mRNA than anticipated, according to leaked documents reviewed by BMJ.
The documents in question relate to a December breach of the European Medicines Agency (EMA), which was one of the many victims of pharma-related cyber breaches in 2020.
A Pfizer spokesperson acknowledged the leaked documents, stressing that any questions EMA had related to the vaccine have been resolved transparently.
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