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EMB analysis of patients with acute myocarditis following COVID‐19 mRNA vaccination revealing acute lymphocytic myocarditis with elevated CD3 + T cells and CD68 + macrophages in Cases 1 and 3. No lymphocytic, eosinophilic, or giant cell myocarditis was detected in Case 2. (RT‐)PCR revealed HHV6B DNA in the myocardium and HHV7 persistence in the EDTA blood in Case 2.
