Researchers retract preprint study that miscalculated higher heart inflammation risk for Moderna, Pfizer COVID vaccines

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.