ArticleScientific reports2024
An unexpected IgE anti-receptor binding domain response following natural infection and different types of SARS-CoV-2 vaccines.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
7 citing papers in PubMed.
- Vaccination-first immune priming shapes a sustained mRNA vaccine-induced IgG4 class switch that associates with SARS-CoV-2 breakthrough infection risk.Scientific reports · 2026Article
- Review
- High Free IgE and Mast Cell Activation in Long COVID: Mechanisms of Persistent Immune Dysregulation.Life (Basel, Switzerland) · 2025Article
- Blood parameters differentiate post COVID-19 condition from Myalgic Encephalomyelitis/Chronic Fatigue Syndrome and Fibromyalgia.Brain, behavior, & immunity - health · 2025Article
- Immunological Mechanisms Underlying Allergy Predisposition After SARS-CoV-2 Infection in Children.Cells · 2025Review
- Frequency of IgE antibody response to SARS-CoV-2 RBD protein across different disease severity COVID19 groups.Virology journal · 2025Article
- The role of immunoglobulin E in non-atopic disorders.Frontiers in immunology · 2025Review
Corrections and comments
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Authors and funding
10 authors.
Funding
Abstract
Humoral response to SARS-CoV-2 has been studied, predominantly the classical IgG and its subclasses. Although IgE antibodies are typically specific to allergens or parasites, a few reports describe their production in response to SARS-CoV-2 and other viruses. Here, we investigated IgE specific to receptor binding domain (RBD) of SARS-CoV-2 in a Brazilian cohort following natural infection and vaccination. Samples from 59 volunteers were assessed after infection (COVID-19), primary immunization with vectored (ChAdOx1) or inactivated (CoronaVac) vaccines, and booster immunization with mRNA (BNT162b2) vaccine. Natural COVID-19 induced IgE, but vaccination increased its levels. Subjects vaccinated with two doses of ChAdOx1 exhibited a more robust response than those immunized with two doses of CoronaVac; however, after boosting with BNT162b2, all groups presented similar IgE levels. IgE showed intermediate-to-high avidity, especially after the booster vaccine. We also found IgG4 antibodies, mainly after the booster, and they moderately correlated with IgE. ELISA results were confirmed by control assays, using IgG depletion by protein G and lack of reactivity with heterologous antigen. In our cohort, no clinical data could be associated with the IgE response. We advocate for further research on IgE and its role in viral immunity, extending beyond allergies and parasitic infections.
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Registered trials
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