No additional AE; HBP calling on behalf of Physician with a report of an adverse event regarding an expired dose of PROQUAD that was inadvertently administered to a patient. HBP stated that the PROQUAD had a labeled expiration date of 1/5/2025 and was administered o; This spontaneous report was received from a Health business professional and refers to a patient of unknown age and gender. The patient’s pertinent medical history, concurrent conditions, concomitant medications and previous drugs reactions or allergies were not reported. On 17-JAN-2025, the patient was vaccinated with an expired dose of measles, mumps, rubella and varicella (oka-merck) virus vaccine live (rHA[recombinant human albumin]) (PROQUAD) injection, 0.5 milliliter, administered as prophylaxis (Lot No. X018584 has been verified to be a valid lot number for [measles, mumps, rubella and varicella (oka-merck) virus vaccine live], expiration date reported and upon internal validation established as 05-JAN-2025) (strength, dose number, route of administration, anatomical location of administration and vaccination scheme frequency were not provided)(expired product administered). No additional adverse event was reported (no adverse event)