During a pre-scheduled visit for health maintenance, a physician evaluates a 1-year-old male infant. Medical history is notable for severe atopic dermatitis, which recently necessitated a prolonged course of systemic corticosteroids. Specifically, he has been taking oral prednisone (2 mg/kg daily) for the past 28 days. His skin flare has now largely resolved, and the physician plans a gradual taper of the medication. The infant is clinically stable, afebrile, and behaving normally. According to his medical records, he received all indicated immunizations during his first 6 months of life. As the physician prepares orders for today's routine immunizations, which of the following preparations is strictly contraindicated at this time?
- AHaemophilus influenzae type b vaccine
- BHepatitis A vaccine
- CHepatitis B vaccine
- Measles-mumps-rubella vaccineAnswer
- EPneumococcal conjugate vaccine
Answer
The measles-mumps-rubella (MMR) vaccine is strictly contraindicated because it is a live-attenuated vaccine and the patient is currently severely immunocompromised from high-dose corticosteroid therapy.
The correct answer is the measles-mumps-rubella (MMR) vaccine. Patients receiving high-dose systemic corticosteroids, defined as greater than or equal to 2 mg/kg/day (or 20 mg/day) of prednisone for 14 days or longer, are considered severely immunocompromised. In such patients, all live-attenuated vaccines, including the MMR and varicella vaccines, are strictly contraindicated due to the severe risk of uncontrolled vaccine-strain viral replication and disseminated infection. High-dose systemic steroids must be discontinued for at least 1 month before live vaccines can be safely administered.
Step-by-Step Solution
Key Concept
Patients receiving high-dose systemic corticosteroids (≥2 mg/kg/day or ≥20 mg/day of prednisone for ≥14 days) are considered severely immunocompromised and should not receive live-attenuated vaccines such as MMR and varicella until therapy is discontinued for at least 1 month.