A timeline of COVID-19 vaccines and the progression of myocarditis is given below.
2020
Sept. 22, 2020: the U.S. Centers for Disease Control and Prevention (CDC) classified myocarditis as a potentially harmful adverse event.
Oct. 30, 2020: The American Food and Drug Administration (FDA) classifies myocarditis as an adverse event of particular interest.
December 2020: One instance of pericarditis was reported to the CDC and FDA-managed VAERS (U.S. Vaccine Adverse Event Reporting ...
