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Report #2843368

Received May 30, 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
KS
Recovered
Unknown
Vaccinated
May 12, 2025
Onset
May 12, 2025
Days to onset
0
Hospital days
—

Vaccines (1)

TypeNameManufacturerDoseLotRoute / Site
MMRMEASLES + MUMPS + RUBELLA (MMR II)MERCK & CO. INC.UNKX028353—

Symptoms (2)

No adverse eventUnderdose

Symptom narrative

no adverse event; some of the vaccine spilled out resulting in a lower than recommended dose; some of the vaccine spilled out; that this was a user error; This spontaneous report was received from a medical assistant and refers to a 9-month-old patient of unknown gender. The patient's medical history, concurrent conditions and concomitant therapies were not reported. On 12-May-2025, the patient was vaccinated with Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II) (lot #X028353 was verified to be a valid number, expiration date: 11-Dec-2025) (dose, scheme, injection site, formulation and route of administration was not reported), reconstituted with sterile diluent (BAXTER Sterile Diluent) (dose, formulation, expiration date and lot # were not reported) for prophylaxis; while administering some of the vaccine spilled out (product leakage) resulting in a lower than recommended dose (underdose). The Medical Assistant reports that this was a user error (wrong technique in product usage process) and not related to any product quality issue with the vaccine or syringe. No additional adverse event was reported.

Other medications

Sterile diluent