Heart-inflammation risk from Pfizer COVID vaccine is very low.

Heart-inflammation risk from Pfizer COVID vaccine is very low – Nature

Original studies:

Large cohort study with over 2.5 million individuals showed the incidence of myocarditis after the Pfizer vaccine was 2.13 cases per 100,000 persons.

Study with over 5.1 million vaccinated individuals showed the incidence of myocarditis after the receipt of the Pfizer vaccine was low and more common after the second dose in young male recipients.