A 6-month-old male infant born to an HIV-positive mother on antiretroviral therapy (CD4 count 200 cells/μL) presents to the immunisation clinic for routine vaccination. The mother is concerned about which vaccines her child should receive given the maternal HIV status. The infant is clinically well with no signs of immunodeficiency. According to the National Immunisation Schedule of India, which of the following vaccines should be AVOIDED in this child at this visit?

Question

A 6-month-old male infant born to an HIV-positive mother on antiretroviral therapy (CD4 count >200 cells/μL) presents to the immunisation clinic for routine vaccination. The mother is concerned about which vaccines her child should receive given the maternal HIV status. The infant is clinically well with no signs of immunodeficiency. According to the National Immunisation Schedule of India, which of the following vaccines should be AVOIDED in this child at this visit?

Accepted Answer

A. Oral Polio Vaccine (OPV). ## Immunisation in HIV-Exposed Uninfected (HEU) Infants

**Key Point:** Children born to HIV-positive mothers on effective antiretroviral therapy (ART) with CD4 count >200 cells/μL are considered HIV-exposed uninfected (HEU) and should receive most routine vaccines, but LIVE vaccines must be avoided until HIV status is confirmed negative and CD4 count is adequate.

**High-Yield:** Oral Polio Vaccine (OPV) is a LIVE attenuated vaccine and is contraindicated in:
  - Confirmed HIV-positive children with CD4 <200 cells/μL
  - HEU infants until HIV infection is ruled out (typically after 18 months with negative serology)
  - Any child with suspected or confirmed immunodeficiency

### Vaccine Strategy in HEU Infants (NIS India)

| Vaccine | Status | Rationale |
| --- | --- | --- |
| **OPV** | **CONTRAINDICATED** | Live vaccine; risk of vaccine-derived poliovirus (VDPV) shedding |
| **IPV** | Recommended | Inactivated; safe even if child is HIV-positive |
| **DPT** | Recommended | Inactivated; safe and protective |
| **Hepatitis B** | Recommended | Inactivated; critical for HEU infants |
| **BCG** | Avoid until HIV status confirmed | Live vaccine |
| **Measles/MMR** | Avoid until CD4 >200 cells/μL | Live vaccine |

**Clinical Pearl:** The key distinction is that **inactivated vaccines are safe** in HEU infants and should be given on schedule, but **live vaccines must be deferred** until HIV infection is excluded and immune reconstitution is confirmed.

**Mnemonic:** **"LIVE = Lethal In Very Early/Exposed"** — avoid live vaccines (OPV, BCG, MMR, varicella) in HEU infants until HIV status is definitively negative and CD4 recovery is documented.

### Why OPV is Specifically Contraindicated

OPV is a live attenuated oral vaccine. In immunocompromised hosts (including HEU infants with unknown HIV status), there is a risk of:
  1. Vaccine virus reversion to virulence
  2. Prolonged viral shedding
  3. Vaccine-derived poliovirus (VDPV) transmission to contacts
  4. Vaccine failure due to poor immune response

IPV (inactivated) is the safe alternative and is part of the NIS schedule for HEU infants.

Answer

B. Inactivated Polio Vaccine (IPV)

Answer

C. Hepatitis B vaccine

Answer

D. Diphtheria-Tetanus-Pertussis (DPT)

Explanation

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