Myocarditis and Pericarditis: mRNA Vaccines in Ontario

“Since the start of the COVID-19 immunization program in Ontario, there have been 314 reports of myocarditis or pericarditis following receipt of COVID-19 mRNA vaccines in Ontario.”

Ontario Agency for Health Protection and Promotion (Public Health Ontario). Myocarditis and pericarditis following vaccination with COVID-19 mRNA vaccines in Ontario: December 13, 2020 to August 7, 2021. Toronto, ON: Queen’s Printer for Ontario; 2021.

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