Report #2893520

Received Apr 22, 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: Male
Age: 36 yrs
State: MD
Recovered: Unknown
Vaccinated: Apr 15, 2026
Onset: Apr 15, 2026
Days to onset: 0
Hospital days: —

Vaccines (1)

Type	Name	Manufacturer	Dose	Lot	Route / Site
HEP	HEP B (ENGERIX-B)	GLAXOSMITHKLINE BIOLOGICALS	UNK	5F244	—

Symptoms (1)

Underdose

Symptom narrative

Engerix-B pediatric dose given to an adult; Underdose; 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 36-year-old male patient who received HBV (Engerix B) (batch number 5F244, expiry date 09-SEP-2027) for prophylaxis. On 15-APR-2026, the patient received Engerix B. On 15-APR-2026, an unknown time after receiving Engerix B, the patient experienced adult use of a child product (Verbatim: Engerix-B pediatric dose given to an adult) and underdose (Verbatim: Underdose). 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 15-APR-2026 A healthcare provider wanted to know how to proceed with an adult patient that received a shot of Engerix-B pediatric.