Report #2880654

Received Jan 5, 2026

A note on interpretation. VAERS reports are unverified and may be incomplete or coincidental. A report does not establish that a vaccine caused an event, and counts should not be used to calculate incidence or infer causation. Full disclaimer

Overview

Sex: Female
Age: Age unknown
State: AZ
Recovered: Unknown
Vaccinated: Dec 22, 2025
Onset: Dec 22, 2025
Days to onset: 0
Hospital days: —

Vaccines (1)

Type	Name	Manufacturer	Dose	Lot	Route / Site
HEP	HEP B (ENGERIX-B)	GLAXOSMITHKLINE BIOLOGICALS	UNK	jb4k2	—

Symptoms (1)

Underdose

Symptom narrative

Pediatric dose administered to adult; Pediatric dose administered to adult; This non-serious case was reported by a other health professional via call center representative and described the occurrence of underdose in a 57-year-old female patient who received HBV (Engerix B pediatric) (batch number jb4k2, expiry date 23-JAN-2027) for prophylaxis. On 22-DEC-2025, the patient received Engerix B pediatric. On 22-DEC-2025, an unknown time after receiving Engerix B pediatric, the patient experienced underdose (Verbatim: Pediatric dose administered to adult) and adult use of a child product (Verbatim: Pediatric dose administered to adult). The outcome of the underdose and adult use of a child product were not applicable. This report is made by GSK without prejudice and does not imply any admission or liability for the incident or its consequences.