Vidqun : That means Covid-19 infection does not cause myocarditis/pericarditis.
That is an impressive study and does conclude "there is no increase in the incidence of myocarditis and pericarditis
in COVID-19 recovered patients compared to uninfected matched controls." However, that does not mean that Covid-19 infection does not cause myocarditis/pericarditis. Why? The report says :
It has recently been reported that the incidence of myocarditis and
pericarditis is increased in COVID-19 patients during the acute illness.
However; whether or not myocarditis and pericarditis after the recovery
period are a part of the long COVID-19 syndrome is yet unknown. Herein,
we studied the incidence of myocarditis and pericarditis in a large
cohort of COVID-19 patients after recovering from the acute infection.
If we consider the incidence of myocarditis and pericarditis during acute COVID-19 illness the results are different. The report referred to above in the New England Journal of Medicine concludes :
The vaccine [BNT162b2 mRNA] was associated with an excess risk of myocarditis (1 to 5
events per 100,000 persons). The risk of this potentially serious
adverse event [11.0 events per
100,000 persons] and of many other serious adverse events [pericarditis, arrhythmia, deep-vein thrombosis,
pulmonary embolism, myocardial infarction, intracranial hemorrhage, and
thrombocytopenia] was substantially
increased after SARS-CoV-2 infection.
See this image for risk ratios for adverse events after vaccination and COVID-19 infection.
So, both the vaccine and COVID-19 increase the risk of myocarditis. COVID-19 also increases the risk of pericarditis and other serious disease. I do agree that the case mentioned by the "Telegraph" is an exception to the rule and that most young, healthy people who contract Covid-19 do not suffer serious adverse events.