Question 1
134 of 150. A pediatric patient presents for a well-child visit. The child has no health conditions, but lives with an older sibling receiving induction chemotherapy for leukemia. The parents ask if the healthy child can receive the scheduled MMR and varicella vaccines today. What is the best response?
▸ Why C is the answer
Healthy children who reside with severely immunosuppressed contacts should receive routine live vaccines like MMR and varicella. This practice establishes a protective barrier of immunity around the vulnerable family member. The MMR vaccine virus is not transmitted to contacts. While the varicella vaccine virus can theoretically be transmitted if the vaccinated child develops a rash, the risk is minimal compared to the danger of bringing wild-type varicella into the home. Option A and Option D are incorrect because withholding the vaccines increases the likelihood that the healthy child will contract a wild-type infection and infect the sibling. Option B is incorrect because routine masking is not required following vaccination, as respiratory transmission of these vaccine strains is not a clinical concern.
🔑 Key takeaway
Healthy children living with immunosuppressed contacts should receive live vaccines to provide protective household herd immunity.