A nurse is collecting a medication history from the parent of a preschooler who comes to the clinic for routine immunizations. For which of the following findings should the nurse withhold the varicella immunization?

Choice A rationale An allergy to eggs is not a contraindication for the varicella immunization. While some vaccines contain egg proteins, the varicella vaccine is produced in human diploid cells and does not contain significant egg components, making it safe for individuals with egg allergies. Choice B rationale Receiving treatment for leukemia represents a significant contraindication for the varicella immunization. Leukemia treatment often involves immunosuppressive chemotherapy, which severely compromises the immune system. Administering a live attenuated vaccine, like varicella, to an immunocompromised individual carries a high risk of causing disseminated vaccine-strain infection. Choice C rationale A pregnant parent's status does not directly contraindicate the varicella immunization for a preschooler. While the varicella vaccine is contraindicated in pregnant individuals due to the live virus, there is no contraindication for the child to receive the vaccine when a parent is pregnant, as transmission risk from a recently vaccinated child is extremely low. Choice D rationale Taking acetaminophen for mild discomfort is not a contraindication for the varicella immunization. Acetaminophen is a common analgesic and antipyretic that does not interfere with the immune response to vaccines or increase the risk of adverse reactions to the varicella vaccine.