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  • Title: Vaccination counseling with and without excipient skin testing in patients with suspected allergic reactions to mRNA COVID-19 vaccines and patients with atopy.
    Author: Khokhar D, O'Shea KM, Akin C, Baldwin JL, Benjamin MR, Ravikumar R, Hosler M, McMorris MS, Sanders GM, Troost JP, Baptist AP, Oberdoerster DT, Kovalszki A.
    Journal: J Allergy Clin Immunol Glob; 2022 Nov; 1(4):209-216. PubMed ID: 36090592.
    Abstract:
    BACKGROUND: Allergic reactions have been reported with mRNA vaccines for COVID-19 prevention. Patients perceived to be at higher risk for a reaction may be referred to an allergist, although evaluation strategies may differ between allergists. OBJECTIVE: Our aim was to determine outcomes of COVID-19 vaccinations in patients evaluated by an allergist using different approaches. METHODS: We conducted a retrospective case series evaluation of 98 patients seen at the University of Michigan Allergy Clinic for concerns regarding COVID-19 vaccination. Of these 98 patients, 34 underwent skin testing with polyethylene glycol (PEG) 2000 with or without PEG 3350/polysorbate 80 testing. RESULTS: Of the 34 patients on whom skin testing was performed, 16 underwent testing before vaccination and 18 underwent testing after a reported vaccine-related event. One patient had a positive skin testing result in response to PEG 3350 following a vaccination reaction and natural infection and was advised against a second dose. One patient with a significant history concerning of anaphylaxis in response to PEG had positive results of testing to identify allergy to PEG 2000, PEG 3350, and polysorbate 80 and was advised against vaccination. Of the 98 patients, 63 (64%) tolerated COVID-19 vaccination without complication after evaluation by an allergist. CONCLUSION: No significant differences were found between vaccination counseling with and without skin testing to excipients. Patients who presented before the first dose of vaccination were more likely to proceed with COVID-19 vaccination and tolerate vaccination without complication.
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