Myocarditis. Rare enough to find it ways onto the fact sheet. https://www.fda.gov/media/144413/download -- The CDC has published clinical considerations relevant to myocarditis and pericarditis associated with administration of the Pfizer-BioNTech COVID-19 Vaccine (https://www.cdc.gov/vaccines/covid-19/clinicalconsiderations...).

As for the vaccine insert. There isn't one. Please find it, and not just the fact sheet that's being offered. I'll save you some time and tell you why you can't find it. Clinical trial practitioners don't need to place inserts in packages for trials or EUA. Its called double blind. And anyone taking this is in the trials. If the FDA approves this poison, you can be sure that that is intentional genocide.