No adverse side effects were reported; HCP called to report that a patient had been administered MMR II after the expiration date. Administered 1/21/2025, expired 1/19/2025.; This spontaneous report has been received from a nurse regarding a 5-year-old female patient. The patient’s medical history and concurrent conditions were not reported. Concomitant medications included sterile diluent (MERCK STERILE DILUENT). On 21-JAN-2025 (also reported as 24-JAN-2025), the patient was vaccinated with an expired dose of measles, mumps, and rubella (wistar ra 27-3) virus vaccine, live (rHA) (M-M-R II) injection, administered for prophylaxis, (lot number reported as X002058, expiration date reported and validated as 19-JAN-2025) (strength, dose, vaccination scheme, route of administration, and anatomical site of injection were not provided) (Expired product administered). No adverse side effects were reported.