Report #2880995

Received Jan 7, 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: 25 yrs
State: MN
Recovered: Unknown
Vaccinated: Dec 11, 2025
Onset: Dec 11, 2025
Days to onset: 0
Hospital days: —

Vaccines (1)

Type	Name	Manufacturer	Dose	Lot	Route / Site
HEP	HEP B (ENGERIX-B)	GLAXOSMITHKLINE BIOLOGICALS	UNK	9G523	—

Symptoms (1)

Underdose

Symptom narrative

Pediatric dose to an adult patient; Pediatric dose to an adult patient; This non-serious case was reported by a other health professional via call center representative and described the occurrence of adult use of a child product in a 25-year-old female patient who received HBV (Engerix B pediatric) (batch number 9G523) for prophylaxis. On 11-DEC-2025, the patient received Engerix B pediatric. On 11-DEC-2025, an unknown time after receiving Engerix B pediatric, the patient experienced adult use of a child product (Verbatim: Pediatric dose to an adult patient) and underdose (Verbatim: Pediatric dose to an adult patient). The outcome of the adult use of a child product and underdose 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. Additional Information: GSK Receipt Date: 05-JAN-2026