evidence: Myocarditis and/or pericarditis following vaccination with mRNA and other COVID-19 vaccines Rare cases of myocarditis (inflammation of the heart muscle) and/or pericarditis (inflammation of the lining around the heart) have been reported following vaccination with mRNA and protein subunit COVID-19 vaccines. [...] Selected references - Abraham N, Spruin S, Rossi T, Fireman B, Zafack J, Blaser C, et al. Myocarditis and/or Pericarditis Risk After mRNA COVID-19 Vaccination: A Canadian Head to Head Comparison of BNT162b2 and mRNA-1273 Vaccines. JVAC-D-21-03106, Available at SSRN: https://ssrn.com/abstract=3988612 - AstraZeneca Canada Inc. Product monograph - Evusheld™. April 14, 2022.