National French Data*: Among 12-29 year olds, Pfizer/BNT mRNA covid-19 vaccine booster associated with 4.9X increased risk of myocarditis, peaking at 6.0X increased risk <170 days after primary series

(*An extension of this June 25, 2022 report in Nature)

Full preprint pdf here: France Booster Myocarditis

Figure and Table also include Moderna data, albeit there are no data regarding boostering 12-29 year olds with the Moderna vaccine

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