Anaphylaxis after zoster vaccine: Implicating alpha-gal allergy as a possible mechanism.
Stone CA, Hemler JA, Commins SP, Schuyler AJ, Phillips EJ, et al.
The Journal of allergy and clinical immunology •
A patient with alpha-gal allergy presented with anaphylaxis after receiving zoster vaccine. Subsequent testing of selected vaccines revealed the presence of alpha-gal allergen in MMR and zoster vaccines, which have in common a higher content of gelatin and content of bovine calf serum.