Messenger RNA (mRNA) vaccines against SARS-CoV-2 are highly effective and were instrumental in curbing the COVID-19 pandemic. However, rare cases of noninfective myocarditis, particularly in young males and typically after the second dose, have been observed. Here, we explore the mediators of this myocarditis to better understand and to enhance the safety of future mRNA… Continue reading Inhibition of CXCL10 and IFN-γ ameliorates #myocarditis in preclinical models of SARS-CoV-2 #mRNA vaccination
Tag: mRNA
Impact of #mRNA and Inactivated COVID-19 Vaccines on #Ovarian Reserve
Objectives: This study aimed to elucidate the effects of messenger RNA (mRNA) and inactivated coronavirus disease 2019 (COVID-19) vaccines on ovarian histology and reserve in rats. Methods: Thirty female Wistar albino rats, aged 16–24 weeks, were randomly divided into three groups (n = 10): control, mRNA vaccine, and inactivated vaccine groups. Each vaccine group received… Continue reading Impact of #mRNA and Inactivated COVID-19 Vaccines on #Ovarian Reserve
COVID-19 #vaccines and #adverse events of special interest: A multinational Global Vaccine Data Network (GVDN) cohort study of 99 million vaccinated individuals
AbstractBackground: The Global COVID Vaccine Safety (GCoVS) Project, established in 2021 under the multinational Global Vaccine Data Network™ (GVDN®), facilitates comprehensive assessment of vaccine safety. This study aimed to evaluate the risk of adverse events of special interest (AESI) following COVID-19 vaccination from 10 sites across eight countries.Methods: Using a common protocol, this observational cohort… Continue reading COVID-19 #vaccines and #adverse events of special interest: A multinational Global Vaccine Data Network (GVDN) cohort study of 99 million vaccinated individuals
The Immunologic Downsides Associated with the Powerful Translation of Current #COVID-19 Vaccine #mRNA Can Be Overcome by Mucosal Vaccines
The action of mRNA-based vaccines requires the expression of the antigen in cells targeted by lipid nanoparticle–mRNA complexes. When the vaccine antigen is not fully retained by the producer cells, its local and systemic diffusion can have consequences depending on both the levels of antigen expression and its biological activity. A peculiarity of mRNA-based COVID-19… Continue reading The Immunologic Downsides Associated with the Powerful Translation of Current #COVID-19 Vaccine #mRNA Can Be Overcome by Mucosal Vaccines
IgG4 Antibodies Induced by Repeated Vaccination May Generate Immune Tolerance to the SARS-CoV-2 Spike Protein
Less than a year after the global emergence of the coronavirus SARS-CoV-2, a novel vaccine platform based on mRNA technology was introduced to the market. Globally, around 13.38 billion COVID-19 vaccine doses of diverse platforms have been administered. To date, 72.3% of the total population has been injected at least once with a COVID-19 vaccine.… Continue reading IgG4 Antibodies Induced by Repeated Vaccination May Generate Immune Tolerance to the SARS-CoV-2 Spike Protein
Myocarditis Cases Reported After mRNA-Based COVID-19 Vaccination in the US From December 2020 to August 2021
Vaccination against COVID-19 provides clear public health benefits, but vaccination also carries potential risks. The risks and outcomes of myocarditis after COVID-19 vaccination are unclear.Objective To describe reports of myocarditis and the reporting rates after mRNA-based COVID-19 vaccination in the US.Design, Setting, and Participants Descriptive study of reports of myocarditis to the Vaccine Adverse Event Reporting System… Continue reading Myocarditis Cases Reported After mRNA-Based COVID-19 Vaccination in the US From December 2020 to August 2021
Fulminant myocarditis with complete atrioventricular block after mRNA COVID-19 vaccination: A case report
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… Continue reading Fulminant myocarditis with complete atrioventricular block after mRNA COVID-19 vaccination: A case report
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
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