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Are cardiac side effects more common than we think?

The Claim:

Several online influencers across platforms are boosting a newly published Swiss study, claiming the study proves that cardiac events after vaccination are more common than we are being led to believe.

The Facts:

An interesting note: our former rapper from above also cited an article discussing this Swiss study. Why does this matter? The study concludes that vaccine-induced myocarditis is mild and people’s outcomes are good.

The study investigated the effects of an mRNA COVID booster vaccination on the heart. The authors found that about 2.8% of participants showed elevated levels of a protein called high-sensitivity cardiac troponin T (hs-cTnT) in their blood after receiving the booster. This protein can indicate possible heart injury. It can also indicate someone has just finished strenuous exercise and many other conditions.

The study did not measure participants’ baseline levels before vaccination, so some individuals might have had elevated levels before getting the vaccine. The troponin elevation observed was moderate and transient, similar to what can occur after intense physical activity. This moderate increase may not mean anything about the vaccine or myocarditis.

The risk of severe cardiovascular problems from COVID is higher than the mild and transient effects observed in the study. COVID can lead to serious heart complications, making the benefits of vaccination far outweigh the minimal risks indicated by the study.

Disclaimer: Science is always evolving and our understanding of these topics may have evolved too since this was originally posted. Be sure to check out our most recent posts and browse the latest Just the Facts Topics for the latest.

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