A randomized double-blinded trial to assess recurrence of systemic allergic reactions following COVID-19 mRNA vaccination - 05/06/24
Abstract |
Background |
Systemic allergic reactions (sARs) following coronavirus disease 2019 (COVID-19) mRNA vaccines were initially reported at a higher rate than after traditional vaccines.
Objective |
We aimed to evaluate the safety of revaccination in these individuals and to interrogate mechanisms underlying these reactions.
Methods |
In 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.
Results |
Of 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.
Conclusions |
Our findings support revaccination of individuals who report sARs to COVID-19 mRNA vaccines. Distinct clinical and laboratory features may distinguish sARs from ISRRs.
Il testo completo di questo articolo è disponibile in PDF.Key words : Anaphylaxis, COVID-19, mRNA, vaccine, immunization stress-related response, ISRR, allergic reaction, PEG
Abbreviations used : AE, CoFAR, COVID-19, FDA, HR, IQR, ISRR, NIAID, NIH, PEG, sAR, SBP
Mappa
Clinical trial registration: ClinicalTrials.gov (NCT04977479), ClinicalTrials.gov Identifier: NCT04977479. |
Vol 153 - N° 6
P. 1634-1646 - Giugno 2024 Ritorno al numeroBenvenuto su EM|consulte, il riferimento dei professionisti della salute.