Kris Van der Mieren, doctor of the Belgian Cycling Federation said. “In July, the Federal Agency for Medicines and Health Products (FAMHP) received a letter about the risks of the two MRNA vaccines from Pfizer and Moderna. It states that there are cases of myocarditis and pericarditis – inflammation of the heart muscle and inflammation of the heart membrane, which can occur in the 14 days after vaccination, and that it happens more often after a second dose, and more in young, sporty men. But we now know of three! It’s not that rare anymore…..then we worry!” he tells HLN.