The Lareb Side Effects Center has so far received 231 reports of inflammation of the heart muscle (myocarditis) and the pericardium (pericarditis) after corona vaccination. Nearly half of these patients were hospitalized. However, a large part had recovered at the time of reporting to Lareb.
Most of the reports concerned younger men. According to Lareb After the administration of the Pfizer/BioNTech and Moderna vaccines, there were more reports than usual in several age groups up to 40 years. Even after the administration of the AstraZeneca and Janssen vaccines, more reports were received than expected in some age groups. This comparison does not take into account a possible increased number due to infection with Covid-19 or extra alert doctors, Lareb said.
Of the total number of reports, 166 of the cases concerned pericarditis and 65 cases of myocarditis. This concerns 156 reports after vaccination with Pfizer/BioNTech and 38 reports after vaccination with the Moderna vaccine. In addition, 21 people developed pericarditis or myocarditis after being injected with AstraZeneca and 15 after the Janssen vaccine. The vaccine was unknown in one patient. It was about as often the first as the second shot.
“Pericarditis and myocarditis are known rare side effects of the vaccine from Pfizer/BioNTech and Moderna, but not of the vaccines of AstraZeneca and Janssen,” according to the organization that registers the side effects. Lareb recommends more research into this.
According to the side effects center, one man died of heart problems after myocarditis and one man died of heart problems after pericarditis. Both received the Pfizer/BioNTech vaccine and were around 40 years of age. In addition, one man aged 50 and one woman aged 55 died with myocarditis reported. They received the vaccine from Janssen.
The center points out that the vaccine is not always the cause of inflammation of the heart muscle or the pericardium after a corona injection. ‘It can also have another cause, such as a (corona) infection or immune disease.’ According to Lareb, the complaints usually go away on their own or can be treated well with medication.