A 71-year-old man was transferred urgently to our hospital after collapsing near his home post the first shot of the BNT162b2 coronavirus disease 2019 vaccine (Pfizer-BioNTech, Comirnaty®). Immediately after arrival at our hospital, cardiac arrest due to complete atrioventricular block with no ventricular escaped beats was observed on electrocardiogram. Echocardiography showed preserved left ventricular ejection …
Tag: mRNA
Circulating Spike Protein Detected in Post–COVID-19 mRNA Vaccine Myocarditis
BACKGROUND:Cases of adolescents and young adults developing myocarditis after vaccination with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)–targeted mRNA vaccines have been reported globally, but the underlying immunoprofiles of these individuals have not been described in detail.METHODS:From January 2021 through February 2022, we prospectively collected blood from 16 patients who were hospitalized at Massachusetts General …
Continue reading Circulating Spike Protein Detected in Post–COVID-19 mRNA Vaccine Myocarditis
Circulating Spike Protein Detected in Post–COVID-19 mRNA Vaccine Myocarditis
BACKGROUND:Cases of adolescents and young adults developing myocarditis after vaccination with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)–targeted mRNA vaccines have been reported globally, but the underlying immunoprofiles of these individuals have not been described in detail.METHODS:From January 2021 through February 2022, we prospectively collected blood from 16 patients who were hospitalized at Massachusetts General …
Continue reading Circulating Spike Protein Detected in Post–COVID-19 mRNA Vaccine Myocarditis
Pre-exposure to mRNA-LNP inhibits adaptive immune responses and alters innate immune fitness in an inheritable fashion
Hundreds of millions of SARS-CoV-2 mRNA-LNP vaccine doses have already been administered to humans. However, we lack a comprehensive understanding of the immune effects of this platform. The mRNA-LNP-based SARS-CoV-2 vaccine is highly inflammatory, and its synthetic ionizable lipid component responsible for the induction of inflammation has a long in vivo half-life. Since chronic inflammation can lead …
Persistent Cardiac Magnetic Resonance Imaging Findings in a Cohort of Adolescents with Post-Coronavirus Disease 2019 mRNA Vaccine Myopericarditis
We describe the evolution of cardiac magnetic resonance imaging findings in 16 patients, aged 12-17 years, with myopericarditis after the second dose of the Pfizer mRNA coronavirus disease 2019 vaccine. Although all patients showed rapid clinical improvement, many had persistent cardiac magnetic resonance imaging findings at 3- to 8-month follow-up. https://www.jpeds.com/article/S0022-3476(22)00282-7/fulltext ArticleDownload
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