Report #2892277

Received Apr 9, 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: Age unknown
State: CO
Recovered: Recovered
Vaccinated: Jan 13, 2026
Onset: Jan 13, 2026
Days to onset: 0
Hospital days: —

Vaccines (1)

Type	Name	Manufacturer	Dose	Lot	Route / Site
HEP	HEP B (HEPLISAV-B)	DYNAVAX TECHNOLOGIES CORPORATION	1	946914	IM / LA

Symptoms (1)

Wrong product administered

Symptom narrative

Given Engerix Instead of Second Dose of HEPLISAV-B; Initial report received on 16-Mar-2026. A healthcare professional reported that a 23-year-old male received HEPLISAV-B (hepatitis B vaccine) for the first dose of hepatitis B immunization and then received ENGERIX as the second dose. No medical history or concomitant medications were reported. On 13-Jan-2026, the patient received dose 1 of a hepatitis B vaccine [HEPLISAV-B (lot number 946914, expiration date 12-Mar-2028, and NDC number not reported)] in the left deltoid. On 13-Feb-2026, 31 days after having been vaccinated with HEPLISAV-B, there was a mix up of hepatitis vaccines and the patient was given ENGERIX-B instead of a second dose of HEPLISAV-B. No adverse events were reported. No other information was available. Company Comment: The company assessed the event as non-serious.; Sender's Comments: The company assessed the event as non-serious.

Other medications

Engerix b