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Report #2844458

Received Jun 10, 2025

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
20 yrs
State
CO
Recovered
Unknown
Vaccinated
—
Onset
—
Days to onset
—
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
HEPAHEP A (VAQTA)MERCK & CO. INC.UNK——

Symptoms (3)

No adverse eventUnderdoseWrong product administered

Symptom narrative

A FBE called on behalf of an HCP to report an AE for VAQTA in which a 0.5mL pediatric dose administered to an adult patient on an unknown date who should have instead received a 1mL dose. The FBE stated the patient did not experience any other advers; the patient did not experienced any other adverse issues or side effects; This spontaneous report was received from a nurse and refers to a 20-year-old female patient. The patient's concurrent conditions, medical history, concomitant medications, drug reactions or allergies were not reported. On an unknown date, the patient was vaccinated with a dose of Hepatitis A Vaccine, Inactivated (VAQTA) (lot #, expiration date, route of administration, anatomical location not provided) as prophylaxis; but the patient was administered 0.5 mL (which is the pediatric dose) instead of 1 mL (incorrect dose administered). The patient did not experience any other adverse issue or side effect from the dose administered.