A 6-month-old infant born to an HIV-positive mother on antiretroviral therapy (CD4 count >200 cells/μL) presents to the immunisation clinic for routine vaccination. The child's HIV status is unknown. According to the National Immunisation Schedule and IAP guidelines, what is the most appropriate next step?

Explanation

## Management of Immunisation in Infants Born to HIV-Positive Mothers ### Current Guidelines (National & IAP) **Key Point:** According to IAP Immunisation Schedule 2023 and WHO/NACO guidelines, infants born to HIV-positive mothers who are **asymptomatic and of unknown HIV status** should receive **all routine vaccines including live vaccines (OPV, rotavirus)** as per the standard schedule, provided the infant is clinically well and not known to be immunocompromised. ### Rationale for Option D (Correct Answer) 1. **Unknown HIV status ≠ confirmed HIV-positive** — At 6 months, if the infant has not been confirmed HIV-positive by virological testing (HIV DNA PCR), the infant is treated as HIV-exposed but uninfected (HEU) for vaccination purposes. 2. **IAP 2023 guidance** — For HIV-exposed infants of unknown status who are **clinically asymptomatic**, all vaccines including OPV and rotavirus are administered on schedule. Live vaccines are only deferred in **confirmed HIV-positive** children with significant immunosuppression (CD4 <15% or <200 cells/μL). 3. **Mother on effective ART with CD4 >200** — This significantly reduces vertical transmission risk (<2%), making it even less likely the infant is HIV-positive. Withholding live vaccines from a likely uninfected infant causes unnecessary harm (missed protection against polio, rotavirus disease). 4. **OPV and rotavirus safety** — These are contraindicated only in **confirmed** HIV-positive children with severe immunosuppression, not in asymptomatic exposed infants of unknown status. ### Why Option C is Incorrect Option C (defer live vaccines) applies to **confirmed HIV-positive** infants with unknown or low CD4 counts — not to asymptomatic HIV-exposed infants of unknown status. Applying this restriction broadly to all HIV-exposed infants is overly conservative and not supported by current IAP or WHO guidelines. ### Summary Table: Vaccination in HIV-Exposed Infants | Infant Status | OPV | Rotavirus | IPV | DPT/Hep B/PCV | |---|---|---|---|---| | **HIV-exposed, unknown status, asymptomatic** | ✓ Give | ✓ Give | ✓ Give | ✓ Give | | **Confirmed HIV+, CD4 >25% (mild)** | ✓ Give | ✓ Give | ✓ Give | ✓ Give | | **Confirmed HIV+, CD4 <15% (severe)** | ✗ Defer | ✗ Defer | ✓ Give | ✓ Give | **High-Yield:** The critical distinction is **confirmed HIV-positive with immunosuppression** vs. **HIV-exposed of unknown status**. Only the former warrants deferral of live vaccines. **Clinical Pearl:** Do not withhold live vaccines from an asymptomatic, clinically well infant merely because the mother is HIV-positive. The IAP 2023 schedule explicitly supports full vaccination in HIV-exposed but unconfirmed infants. Deferring live vaccines in this scenario would leave the child unprotected against vaccine-preventable diseases unnecessarily. [cite: IAP Immunisation Schedule 2023; WHO Immunization in Practice Module 4; Park's Textbook of Preventive and Social Medicine, 26th ed., Ch. 3]