A nurse is discussing allergies with the guardians of a school-age child prior to administration of the influenza vaccine. The nurse should identify that a prior anaphylactic reaction to which of the following is a contraindication to this immunization?

A. Neomycin is not a contraindication to the influenza vaccine. However, if a person has a known neomycin allergy, they should avoid specific vaccines containing neomycin, but this is not typically a concern with the influenza vaccine. B. Gluten allergies are not a contraindication for the influenza vaccine. Gluten is not an ingredient in most influenza vaccines, so a gluten allergy would not impact vaccine administration. C. The influenza vaccine contains trace amounts of egg proteins, and individuals who have had a severe allergic reaction (anaphylaxis) to eggs should not receive this vaccine, or they should receive it under close supervision with appropriate precautions. This is because egg-based production methods of the vaccine may pose a risk. D. Gelatin is a common ingredient in some vaccines, but a gelatin allergy is not typically a contraindication for the influenza vaccine. However, if a child has a severe allergic reaction to gelatin, caution would be taken in administering the vaccine.