What you need to know
- Myocarditis, or inflammation of the heart muscle, is most commonly caused by a viral infection like COVID-19, not by vaccination.
- In line with previous research, a recent CDC study found no association between COVID-19 vaccination and sudden cardiac death in previously healthy young people.
- A COVID-19 infection is much more likely to cause inflammation of the heart muscle than a COVID-19 vaccine, and those cases are typically more severe.
Since the approval of the first COVID-19 vaccines, anti-vaccine advocates have raised concerns about heart muscle inflammation, also called myocarditis, after vaccination to suggest that vaccines are unsafe. They’ve also used concerns about myocarditis to spread false claims that vaccines cause sudden deaths, which is not true.
Research has consistently shown that cases of myocarditis after vaccination are extremely rare and usually mild, and a new study from the CDC found no association between sudden cardiac death and COVID-19 vaccination in young adults.
Read on to learn more about myocarditis and what the latest research says about COVID-19 vaccine safety.
What is myocarditis?
Myocarditis is inflammation of the myocardium, or the middle muscular layer of the heart wall. This inflammation weakens the heart’s ability to pump blood. Symptoms may include fatigue, shortness of breath, chest pain, rapid or irregular heartbeat, and flu-like symptoms.
Myocarditis may resolve on its own. In rare cases, it may lead to stroke, heart failure, heart attack, or death.
What causes myocarditis?
Myocarditis is typically caused by a viral infection like COVID-19. Bacteria, parasites, fungi, chemicals, and certain medications can also cause myocarditis.
In very rare cases, some people develop myocarditis after receiving a COVID-19 vaccine, but these cases are usually mild and resolve on their own. In contrast, a COVID-19 infection is much more likely to cause myocarditis, and those cases are typically more severe.
Staying up to date on vaccines reduces your risk of developing myocarditis from a COVID-19 infection.
Are COVID-19 vaccines safe for young people?
Yes. COVID-19 vaccines have been rigorously tested and monitored over the past three years and have been determined to be safe for everyone 6 months and older. A recent CDC study found no association between COVID-19 vaccination and sudden cardiac death in previously healthy young adults.
The benefits of vaccination outweigh any potential risks. Staying up to date on COVID-19 vaccines reduces your risk of severe illness, hospitalization, death, long COVID, and COVID-19-related complications, such as myocarditis.
The CDC recommends people 65 and older and immunocompromised people receive an additional dose of the updated COVID-19 vaccine this spring—if at least four months have passed since they received a COVID-19 vaccine.
For more information, talk to your health care provider.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
