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Cutaneous adverse reactions to mRNA COVID-19 vaccines in patients with preexisting dermatologic disease include bullous eruptions, pityriasis rubra pilaris, dermatomyositis, and granuloma annulare. Erythroderma is a rare but severe adverse reaction not previously seen. This case report describes the development of erythroderma in a 73-year-old male with a history of atopic dermatitis, with widespread erythema and scaling covering 95% of his body surface area, which developed sequentially after receiving each dose of the Pfizer-BioNTech (BNT162b2) COVID-19 vaccination. The patient's condition improved significantly with appropriate dermatologic treatment, including systemic and topical corticosteroids and dupilumab. Thus, it is imperative to recognize erythroderma as a potential side effect of the Pfizer-BioNTech COVID-19 vaccine, particularly in patients with preexisting dermatologic conditions. Early diagnosis and treatment are vital for managing this potentially life-threatening reaction and preventing severe complications.
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http://dx.doi.org/10.7759/cureus.68936 | DOI Listing |
Vaccine
September 2025
Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
Background: Covid-19 vaccines are updated to match circulating strains based on reasoning that better strain-matched immunogenicity should provide better protection. Randomized evidence with disease endpoints to support strain matching is lacking. We evaluated COVID-19 incidence among adults randomized to a second booster of Prototype or Omicron-based vaccines.
View Article and Find Full Text PDFAllergol Immunopathol (Madr)
September 2025
Faculty of Medicine, University of Prishtina, University Clinical Center of Kosovo, Prishtina, Republic of Kosovo.
Objective: The aim of this study was to assess the association between allergic reactions after COVID-19 vaccination and the history of high-risk allergy, individual predisposing factors such as age and gender, and COVID-19 vaccine type.
Materials And Methods: This retrospective cohort study included 234 adult patients (18 years old and above) who underwent a COVID-19 vaccine allergy test up until February 2023 in a Clinic of Allergy and Clinical Immunology in the University Clinical Center of Kosovo. All patients suspected of allergy underwent skin testing: SPT (skin prick test) and IDT (intradermal test) using either an mRNA (ribonucleic messenger acid) vaccine (BNT162b2, Pfizer-BioNTech) and/or an adenoviral vector vaccine (AZD1222, AstraZeneca).
Crit Rev Ther Drug Carrier Syst
September 2025
The emergence of messenger ribonucleic acid (mRNA) vaccines as an alternative platform to traditional vaccines has been accompanied by advances in nanobiotechnology, which have improved the stability and delivery of these vaccines through novel nanoparticles (NPs). Specifically, the development of NPs for mRNA delivery has facilitated the loading, protection and release of mRNA in the biological microenvironment, leading to the stimulation of mRNA translation for effective intervention strategies. Intriguingly, two mRNA vaccines, BNT162b2 (Pfizer-BioNTech) and mRNA-1273 (Moderna), have been permitted for emergency usage authorization to prevent COVID-19 infection by USFDA.
View Article and Find Full Text PDFFront Med (Lausanne)
August 2025
School of Medicine, Universidad Norbert Wiener, Lima, Peru.
Introduction: Vaccination against COVID-19 has generated a dramatic reduction in deaths and infections worldwide. However, there may be cross-reactivity with numerous biochemical and immunological markers. The Widal test for the detection of typhoid fever is an antigen-antibody test that can be affected by vaccination, causing errors in the results, so we determined the frequency of false positive results of the Widal test in adults vaccinated with Commirnaty (Pfizer -BioNtech) and BBIBP-CorV (Sinopharm) vaccines.
View Article and Find Full Text PDFAutoimmunity
December 2025
Medicinal Genomics, Beverly, MA, USA.
For some of the COVID-19 vaccines, the drug substances released to market were manufactured differently than those used in clinical trials. Manufacturing nucleoside-modified mRNA (modRNA) for commercial COVID-19 vaccines relies on RNA polymerase transcription of a plasmid DNA template. Previous studies identified high levels of plasmid DNA in vials of modRNA vaccines, suggesting that the removal of residual DNA template is problematic.
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