From the CDC: (The same link you apparently aren't reading) The known and potential benefits of COVID-19 vaccination outweigh the known and potential risks, including the possible risk of myocarditis or pericarditis. Also, most patients with myocarditis and pericarditis who received care responded well to treatment and rest and quickly felt better.
What Myocarditis/Pericarditis Symptoms Should I Be on the Lookout for after mRNA COVID-19 Vaccination? Be on the lookout for any of the following symptoms: * Chest pain * Shortness of breath * Feelings of having a fast-beating, fluttering, or pounding heart Seek medical care if you think you or your child have any of these symptoms within a week after COVID-19 vaccination.
Dude.
Removing the bad observational data yields no evidence for effectiveness.