Report #2878067

Received Dec 16, 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: Unknown
Age: Age unknown
State: AK
Recovered: Unknown
Vaccinated: —
Onset: —
Days to onset: —
Hospital days: —

Vaccines (2)

Type	Name	Manufacturer	Dose	Lot	Route / Site
VARCEL	VARICELLA (VARIVAX)	MERCK & CO. INC.	UNK	—	—
VARCEL	VARICELLA (VARIVAX)	MERCK & CO. INC.	UNK	—	—

Symptoms (2)

Circumstance or information capable of leading to medication errorUnderdose

Symptom narrative

partial dose of VARIVAX was administered to a 12 month old due to the patient leg moving.; No additional AE reported.; This spontaneous report was received from a Registered Nurse and refers to a 12-month-old patient of unknown gender. The patient's concurrent conditions, medical history, previous drug reactions, drug allergies and concomitant therapies were not reported. On an unspecified date, the patient was vaccinated with partial dose of Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) (strength, dose, frequency, route of administration, site of administration, lot #, and expiration date were not provided) due to the patient leg moving (Accidental underdose). No injuries or product issues reported, nurse states the leg was not held down and the patient moved. No additional AE reported. Additional information is not expected.