Podcast 665: Allergic Reactions after COVID Vaccinations

Contributor: Peter Bakes, MD

Educational Pearls:

• Incidence 2.5-10 per million people occurring primarily in those with environmental allergens
• Typically occurs with mRNA vaccines in lipid nanoparticles (Moderna/Pfizer) rather than the adenovirus vaccine (J&J)
• Recommendation is to forego 2nd dose of the mRNA vaccine and instead get the adenovirus vaccine after weighing the risks and benefits

References

Kounis NG, Koniari I, de Gregorio C, Velissaris D, Petalas K, Brinia A, Assimakopoulos SF, Gogos C, Kouni SN, Kounis GN, Calogiuri G, Hung MY. Allergic Reactions to Current Available COVID-19 Vaccinations: Pathophysiology, Causality, and Therapeutic Considerations. Vaccines (Basel). 2021 Mar 5;9(3):221. doi: 10.3390/vaccines9030221. PMID: 33807579; PMCID: PMC7999280.

Blumenthal KG, Robinson LB, Camargo CA, et al. Acute Allergic Reactions to mRNA COVID-19 Vaccines. JAMA. Published online March 08, 2021. doi:10.1001/jama.2021.3976

Summarized by John Spartz, MS3 | Edited by Erik Verzemnieks, MD

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