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Report #2857663

Received Sep 9, 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
Age unknown
State
TX
Recovered
Unknown
Vaccinated
Sep 2, 2025
Onset
Sep 2, 2025
Days to onset
0
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
VARCELVARICELLA (VARIVAX)MERCK & CO. INC.UNKZ004454—

Symptoms (2)

No adverse eventProduct administered to patient of inappropriate age

Symptom narrative

No other AE; VARIVAX was inadvertently administered today (2SEP2025) to a female child who is 4 months and 8 days old; This spontaneous report was received from a health professional and refers to a 4-month-old (reported as "4 months and 8 days old") female patient. Her medical history, concurrent conditions, concomitant therapies and drug reactions/allergies were not reported. On 02-Sep-2025, the patient was inadvertently vaccinated with Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX), batch/lot #Z004454 has been verified to be a valid batch lot number for Varicella Virus Vaccine Live (Oka-Merck), expiration date reported and upon internal validation confirmed as 13-Feb-2027, 0.5 mL, which was diluted with sterile diluent (BAXTER STERILE DILUENT) (batch/lot# 2053170, expiration date reported and upon internal verification confirmed as 20-Mar-2027) and administered as prophylaxis (dosage regimen, anatomical location and route of administration were not reported) (product administered to patient of inappropriate age.) No further information was provided. No other adverse events (AEs) were reported (no adverse event.)

Other medications

DILUENT MRK