A well-designed observational study of the entire French population, just published on June 25 in Nature, has again definitively confirmed (here; here; here; here) observations first noted during February, 2021: covid-19 mRNA vaccination confers an excess risk for serious inflammation (here; here) of the heart—both its muscle (“myocarditis”), and suspending covering (“pericarditis”)—particularly in men under 30 years of age. Two […]