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Report #2847107

Received Jun 24, 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
Male
Age
1 yrs
State
MO
Recovered
Unknown
Vaccinated
Jun 23, 2025
Onset
Jun 23, 2025
Days to onset
0
Hospital days
—

Vaccines (1)

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

Symptoms (2)

No adverse eventUnderdose

Symptom narrative

No additional AE; HCP calling to report an AE regarding the VARIVAX vaccine. HCP reported that a one year old male patient received a smaller than recommended dose of the VARIVAX vaccine. HCP stated that the patient did not receive the full dose of the vaccine and hal; This spontaneous report was received from a medical assistant and refers to a 1-year-old male patient. The patient's medical history was not reported. The patient's concurrent conditions were not reported. Concomitant therapies were not reported. On 23-JUN-2025, the patient was vaccinated with varicella virus vaccine live (Oka-Merck) (VARIVAX) solution for injection (exact dose, dose number, route of administration, anatomical location, lot # and expiration date were not reported), for prophylaxis. The vaccine was reconstituted with sterile diluent (MERCK STERILE DILUENT) before administration (lot # and expiry date were not provided). The patient did not receive the full dose of the vaccine, and half the dose was given to him inadvertently (Accidental underdose). No additional adverse event (AE) was reported. Lot # is being requested and will be provided if received.

Other medications

sterile diluent