A 4-year-old boy is brought to the clinic for a routine well-child preventive care visit. He was diagnosed with perinatal HIV infection and is currently taking antiretroviral therapy. Laboratory evaluation from last week shows a CD4 T-lymphocyte percentage of 12%. He has not received any immunizations since his 18-month well-child visit. His guardian asks to update his routine childhood vaccines so he can attend preschool. Which of the following vaccines is considered safe and most appropriate to administer to this patient today?
- Inactivated polio vaccineCevap
- BMeasles, mumps, and rubella vaccine
- CVaricella vaccine
- DIntranasal influenza vaccine
- ELive attenuated typhoid vaccine
Cevap
Inactivated polio vaccine
The correct answer is the inactivated polio vaccine. Routine childhood immunization is a critical component of clinical preventive services. In children with HIV, a CD4 T-lymphocyte percentage of less than 15% defines severe immunosuppression. Under these conditions, the administration of live-attenuated vaccines is strictly contraindicated because the patient's compromised cell-mediated immunity cannot safely control the replication of the attenuated virus, risking severe or fatal vaccine-strain disease. Conversely, inactivated, killed, or recombinant vaccines—such as the inactivated polio vaccine (IPV) and the intramuscular influenza vaccine—cannot replicate and are entirely safe for immunocompromised patients. Therefore, the inactivated polio vaccine should be administered to keep the patient on schedule for their 4-to-6-year-old preventive milestones.
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Anahtar Kavram
In pediatric patients with severe immunosuppression (e.g., HIV with CD4 < 15%), live-attenuated vaccines are strictly contraindicated, whereas inactivated vaccines are safe and routinely indicated for preventive care.