A nurse is caring for a 6-month-old child. The child's provider has ordered a diphtheria, tetanus, and pertussis (DTaP) vaccine to be administered. Which of the following should cause the nurse to question the administration of this vaccine?

A. New onset of seizure disorder in the child's sibling: This does not contraindicate DTaP vaccination unless the child itself has a history of seizures or neurological disorders. B. Evidence of sensitivity to egg antigens: DTaP vaccine is not contraindicated by egg allergy; this is more relevant to influenza vaccines. C. Afebrile otitis media: This is not a contraindication for DTaP vaccination. D. Temperature of 40.5° C (104.9° F) after last DTaP: A high fever following a previous dose of DTaP may indicate a severe reaction, necessitating caution or further evaluation before administering another dose.