Symptomatic pericarditis after influenza vaccination: Report of two cases

The authors report two cases of benign acute pericarditis after the patients received vaccinations against influenza virus. The diagnoses were confirmed by serologic changes and by the findings of 12-lead electrocardiogram and echocardiography. Symptoms and clinical status improved on aspirin therapy. The authors underline the possible mechanisms of this rare complication of influenza vaccination.