Trial reportThe Journal of allergy and clinical immunology2024
A randomized double-blinded trial to assess recurrence of systemic allergic reactions following COVID-19 mRNA vaccination.
Trial report in The Journal of allergy and clinical immunology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
4 citing papers in PubMed, 5 citations in OpenAlex.
- High levels of nonblocking anti-interferon and anticytokine autoantibodies in individuals with mRNA vaccine-induced systemic allergic reactions.The journal of allergy and clinical immunology. Global · 2026Article
- COVID-19 mRNA revaccination is safe and well tolerated in individuals with previous adverse reactions to the vaccine and/or long COVID.The journal of allergy and clinical immunology. Global · 2026Article
- Basophil activation test to BNT162b2 lacks specificity for predicting allergic reactions to the mRNA vaccine.The journal of allergy and clinical immunology. Global · 2025Article
- Cardiovascular complications in vascular connective tissue disorders after COVID-19 infection and vaccination.PloS one · 2024Article
Corrections and comments
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Authors and funding
27 authors at 6 institutions in 1 country.
Funding
Abstract
backgroundSystemic allergic reactions (sARs) following coronavirus disease 2019 (COVID-19) mRNA vaccines were initially reported at a higher rate than after traditional vaccines.
objectiveWe aimed to evaluate the safety of revaccination in these individuals and to interrogate mechanisms underlying these reactions.
methodsIn this randomized, double-blinded, phase 2 trial, participants aged 16 to 69 years who previously reported a convincing sAR to their first dose of COVID-19 mRNA vaccine were randomly assigned to receive a second dose of BNT162b2 (Comirnaty) vaccine and placebo on consecutive days in a blinded, 1:1 crossover fashion at the National Institutes of Health. An open-label BNT162b2 booster was offered 5 months later if the second dose did not result in severe sAR. None of the participants received the mRNA-1273 (Spikevax) vaccine during the study. The primary end point was recurrence of sAR following second dose and booster vaccination; exploratory end points included biomarker measurements.
resultsOf 111 screened participants, 18 were randomly assigned to receive study interventions. Eight received BNT162b2 second dose followed by placebo; 8 received placebo followed by BNT162b2 second dose; 2 withdrew before receiving any study intervention. All 16 participants received the booster dose. Following second dose and booster vaccination, sARs recurred in 2 participants (12.5%; 95% CI, 1.6 to 38.3). No sAR occurred after placebo. An anaphylaxis mimic, immunization stress-related response (ISRR), occurred more commonly than sARs following both vaccine and placebo and was associated with higher predose anxiety scores, paresthesias, and distinct vital sign and biomarker changes.
conclusionsOur findings support revaccination of individuals who report sARs to COVID-19 mRNA vaccines. Distinct clinical and laboratory features may distinguish sARs from ISRRs.
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.