Leaked documents show that some early commercial batches of Pfizer-BioNTech’s COVID-19 vaccine had lower than expected levels of intact mRNA, prompting wider questions about how to assess this novel vaccine platform.

Tinari, Serena. Data Leak Shows Regulators Had Major Concerns about Pfizer’s MRNA Vaccine”  Children’s Health Defense, 16 March 2021. childrenshealthdefense.org/defender/regulators-major-concerns-pfizers-mrna-vaccine/.