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Report #2864865

Received Oct 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
Unknown
Age
Age unknown
State
CA
Recovered
Unknown
Vaccinated
Oct 3, 2025
Onset
Oct 3, 2025
Days to onset
0
Hospital days
—

Vaccines (2)

TypeNameManufacturerDoseLotRoute / Site
FLUXINFLUENZA (SEASONAL) (NO BRAND NAME)UNKNOWN MANUFACTURERUNK——
MMRMEASLES + MUMPS + RUBELLA (MMR II)MERCK & CO. INC.UNKZ004961—

Symptoms (2)

No adverse eventProduct preparation issue

Symptom narrative

No additional AE/PQC.; a patient who was administered a dose of MMR-II that was inadvertently reconstituted with a prefilled syringe containing a flu vaccine (unspecified) instead of sterile diluent; Caller reported AE on behalf of a patient who was administered a dose of MMR-II that was inadvertently reconstituted with a prefilled syringe containing a flu vaccine (unspecified) instead of sterile diluent on 10/03/2025. No symptoms reported. Obtai; This spontaneous report was received from a Nurse and refers to a 32-year-old patient of unknown gender. The patient's pertinent medical history, concurrent conditions, concomitant medications, and previous drug reactions or allergies were not reported. On 03-Oct-2025, the patient was vaccinated with Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (M-M-R II), lot #Z004961. The lot number has been verified as valid, with an expiration date of 24-Feb-2027. The vaccine was administered at a dose of 0.5 mL for prophylaxis (route of administration and anatomical site of injection were not provided). The vaccine was inadvertently reconstituted with a prefilled syringe containing an influenza vaccine (reported as "flu vaccine," trade name unspecified) instead of the sterile diluent (dose description, indication, lot # and expiration date was not provided) (Wrong vaccine administered, vaccine incorrect diluent used). No symptoms were reported (no adverse event).; Reporter's Comments: Keywords: OCL