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Study Links mRNA Vaccines to Rare Myocarditis Cases

12/11/2025

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Center

Vaccines Trigger Myocarditis

Covid mRNA vaccines from Pfizer and Moderna can trigger myocarditis, especially in young men.
In Britain, more than 2,000 cases of heart inflammation were reported after vaccination.
Researchers at Stanford University identified immune signals CXCL10 and interferon-gamma linked to these cases, and blocking them reduced heart damage in laboratory tests.
Vaccine-induced myocarditis remains rare, at about 7 per million first doses, and is less frequent than myocarditis from SARS-CoV-2 infection.

Left

Officials Address Vaccine Claims

Two FDA officials claimed a link between COVID-19 vaccines and at least 10 child deaths, but the evidence does not support the claim.
Dr. Vinay Prasad and FDA Commissioner Dr. Marty Makary raised concerns about myocarditis, a rare side effect of mRNA vaccines.
Experts say the risk of myocarditis is higher after COVID-19 infection than after vaccination.
Over 2,000 U.S. children have died from COVID-19, many with pre-existing health conditions.

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Vaccines Trigger Myocarditis

Covid mRNA vaccines from Pfizer and Moderna can trigger myocarditis, especially in young men.
In Britain, more than 2,000 cases of heart inflammation were reported after vaccination.
Researchers at Stanford University identified immune signals CXCL10 and interferon-gamma linked to these cases, and blocking them reduced heart damage in laboratory tests.
Vaccine-induced myocarditis remains rare, at about 7 per million first doses, and is less frequent than myocarditis from SARS-CoV-2 infection.

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