The Fact Sheets for Healthcare Providers and for Recipients and Caregivers for Moderna COVID-19 Vaccine and Pfizer-BioNTech COVID-19, which are authorized for emergency use in individuals 6 months through 11 years of age, have also been updated to include the new safety information in alignment with the Comirnaty and Spikevax Prescribing Information and Information for Recipients and Caregivers.
Updated Warning for Myocarditis and Pericarditis
The warning on myocarditis and pericarditis in the Prescribing Information for Comirnaty and Spikevax has been updated to convey that the observed risk of myocarditis and pericarditis following vaccination with mRNA COVID-19 vaccines has been highest in males 12 through 24 years of age and to include the following new language:
Based on analyses of commercial health insurance claims data from inpatient and outpatient settings, the estimated unadjusted incidence of myocarditis and/or pericarditis during the period 1 through 7 days following administration of the 2023-2024 Formula of mRNA COVID-19 vaccines was approximately 8 cases per million doses in individuals 6 months through 64 years of age and approximately 27 cases per million doses in males 12 through 24 years of age.
Follow-up information on cardiovascular outcomes in hospitalized patients who had been diagnosed with COVID-19 vaccine-associated myocarditis is available from a longitudinal retrospective observational study. Most of these patients had received a two-dose primary series of an mRNA COVID-19 vaccine prior to their diagnosis. In this study, at a median follow-up of approximately 5 months post-vaccination, persistence of abnormal cardiac magnetic resonance imaging (CMR) findings that are a marker for myocardial injury was common. The clinical and prognostic significance of these CMR findings is not known.
