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Difficulty: EasyImmunizations and Vaccine-Preventable Diseases

A 44-year-old boy is brought to the pediatric clinic for a routine well-child visit. He has a history of severe persistent asthma. For the past 44 weeks, he has been taking oral prednisone at a dose of 2 mg/kg/day2 \text{ mg/kg/day} to manage a severe exacerbation. His immunizations were completely up to date at his 22-year well-child visit. Which of the following vaccines can be safely administered at today's visit? (Select all that apply)

  1. Diphtheria, tetanus, and acellular pertussis (DTaP) vaccineAnswer
  2. Inactivated poliovirus (IPV) vaccineAnswer
  3. Inactivated influenza vaccineAnswer
  4. D
    Measles, mumps, and rubella (MMR) vaccine
  5. E
    Varicella vaccine

Answer

The correct answers are the Diphtheria, tetanus, and acellular pertussis (DTaP) vaccine, the Inactivated poliovirus (IPV) vaccine, and the Inactivated influenza vaccine.
Inactivated vaccines, such as DTaP, IPV, and the inactivated influenza vaccine, contain no live pathogens and cannot cause disease even in profoundly immunocompromised hosts. Therefore, they are safe to administer to a patient taking high-dose systemic corticosteroids. While the immune response to these vaccines might be blunted compared to a healthy host, they carry no risk of causing disseminated infection.

Step-by-Step Solution

1
Assess the patient's immune status based on his current medications.
The patient is taking high-dose oral corticosteroids (2 mg/kg/day2 \text{ mg/kg/day} for 44 weeks), which causes transient severe immunosuppression.
Systemic corticosteroids at a dose of ≥2 mg/kg/day\ge 2 \text{ mg/kg/day} or ≥20 mg/day\ge 20 \text{ mg/day} for 1414 or more days significantly suppress T-cell function, altering vaccine safety guidelines.
2
Determine the safety of different vaccine types for this patient.
Inactivated vaccines are safe and recommended, while live-attenuated vaccines are absolutely contraindicated.
Live vaccines can cause uncontrolled viral replication and severe, potentially fatal, disseminated disease in severely immunocompromised hosts.
3
Categorize the standard 44-year-old vaccines into live and inactivated types.
DTaP, IPV, and the inactivated influenza vaccine are inactivated. MMR and varicella vaccines are live-attenuated.
Identifying which vaccines are inactivated allows the clinician to determine exactly which shots can be safely given at today's visit.

Key Concept

Patients receiving high-dose systemic corticosteroids (≥2 mg/kg/day\ge 2 \text{ mg/kg/day} for ≥14\ge 14 days) are considered severely immunocompromised; they can safely receive inactivated vaccines but must not receive live-attenuated vaccines.
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Topics

Immunizations and Vaccine-Preventable Diseases

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