A 2-month-old infant received DTwP, Hib, IPV, and Hepatitis B vaccines. Four hours later, she develops hypotonic-hyporesponsive episode (HHE) — pale/cyanotic, floppy, unresponsive for 30 minutes, then recovers fully. What is the CORRECT guidance for future vaccination of this infant?

• A All vaccines must be permanently withheld due to risk of fatal reaction
• B Only inactivated vaccines can be given in the future; live vaccines are permanently contraindicated
• C HHE following DTwP is NOT a contraindication to subsequent doses; vaccination should continue, preferably switching to DTaP ✓
• D Administer all subsequent vaccines under general anesthesia in the ICU

Explanation

Hypotonic-hyporesponsive episode (HHE) following DTwP is a recognized, self-limiting adverse event associated primarily with the whole-cell pertussis component. Despite its alarming appearance, HHE does NOT cause permanent neurological damage and is NOT a contraindication to subsequent vaccination. ACIP, WHO, and IAP guidelines state that HHE is a precaution, not a contraindication. Future DTwP doses may be given, though switching to DTaP (acellular pertussis) is a reasonable option to reduce recurrence risk. Withholding all vaccines leaves the infant susceptible to far more dangerous infections.

Reference: Ghai Essential Pediatrics, 10th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.