About The Study: In this prespecified analysis of the DANFLU-2 trial, the risk of incident myocarditis or pericarditis was lower among individuals randomized to high-dose inactivated influenza vaccine vs standard-dose- inactivated influenza vaccine. Despite sporadic reports of myocarditis and pericarditis associated with influenza vaccination, the consistency of our results with vs without inclusion of events occurring immediately after vaccination negates a dose-response association and a causal link.
Corresponding Author: To contact the corresponding author, Tor Biering-Sørensen, MD, MSc, MPH, PhD, email tor.biering@gmail.com .
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JAMA Network Open
30-Aug-2025