The risk of heart inflammation is up to two or three times higher among people who took Moderna’s COVID-19 vaccine, Spikevax, compared to those who took Pfizer’s Comirnaty, a new study has concluded.

The research, published in the Journal of the American College of Cardiology, is one of several that continue to track the effects of COVID-19 vaccines nearly two years after their initial rollout.

New data on Sarepta’s gene therapy for Duchenne muscular dystrophy (DMD) has gone a long way towards building confidence in its efficacy – but have introduced a concern about its safety.

Moderna's COVID-19 vaccine may pose a higher risk of heart inflammation in some age groups than Pfizer-BioNTech's shot, the U.S. Centers for Disease Control and Prevention said on Tuesday, citing recent data.

Moderna stock toppled Monday after the Food and Drug Administration delayed authorizing its Covid vaccine in teens, citing the risk for myocarditis.

In the past few weeks, anti-vaxxers have rallied behind a nonpeer-reviewed study by a group of Canadian researchers as evidence against COVID-19 vaccines. Turns out, the paper made a fatal mistake in reaching its conclusion.

Scientists at The University of Ottawa Heart Institute have retracted the preprint study, which falsely calculated a 1 in 1,000 risk of heart inflammation for Moderna's and Pfizer-BioNTech's mRNA COVID vaccines.

The Pfizer-BioNTech Covid-19 vaccine is associated with an increased risk of myocarditis, an inflammation of the heart muscle, a large new study from Israel confirms. But the side effect remains rare, and Covid-19 is more likely to cause myocarditis than the vaccine is, scientists reported on Wednesday.

As governments and now even businesses push citizens to get vaccinated against COVID-19, anti-vaxxers are loading up more ammo for their argument with this week's report.

In June, the CDC released information about a possible connection between rare cases of myocarditis or pericarditis and the mRNA vaccines developed by Moderna and Pfizer. It was reported that cases were extremely rare when considering the number of jabs given. Between the two brands, it reportedly averaged out to 12.6 cases per million doses.

The safety committee of the European Medicines Agency (EMA) has concluded that myocarditis and pericarditis can occur in very rare cases following vaccination with the COVID-19 vaccines from Pfizer and Moderna.

Concerns over vaccination links to heart inflammation are valid, a U.S. Centers for Disease Control and Prevention advisory committee announced this afternoon. The panel said there’s a likely connection between rare cases of myocarditis or pericarditis and the mRNA vaccines developed by Moderna and Pfizer.