Worried about heart inflammation and COVID-19 vaccines? Here's what we know

Some researchers have recently said they believe there is a link between mRNA COVID-19 vaccines and a small number of people developing myocarditis — an inflammation of the heart muscle.  Here are the answers to some of the questions people are asking:    

What causes myocarditis?

“It’s not something that is super common,” said Dr. Carolyn Quach-Thanh, a pediatric infectious disease specialist and medical microbiologist at CHU Sainte-Justine in Montreal.  

When myocarditis occurs, it’s often after various types of viral infection, from the