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 are produced using egg embryos, the varicella vaccine is cultured in human diploid cells, meaning it does not contain egg proteins. Therefore, a history of egg allergy does not pose a significant risk for an adverse reaction to this specific vaccine. Choice B rationale Receiving treatment for leukemia indicates a compromised immune system, often due to chemotherapy or the disease itself. Live attenuated vaccines, like varicella, can replicate in immunocompromised individuals, potentially causing a disseminated infection. Therefore, the vaccine should be withheld to prevent serious complications in this vulnerable population. Choice C rationale A pregnant parent is not a contraindication for administering the varicella immunization to a preschooler. The vaccine is given to the child, not the parent, and there is no evidence that vaccination of the child poses a direct risk of fetal harm to the pregnant parent through indirect transmission. Choice D rationale Taking acetaminophen for mild discomfort is not a contraindication for the varicella immunization. Acetaminophen is an antipyretic and analgesic, and its use does not interfere with the immune response to the vaccine or increase the risk of adverse events. It can, in fact, be used to manage post-vaccination discomfort.