No additional AE; PROQUAD was administered during a temperature excursion on 1/23/2025.; This spontaneous report was received from a medical assistant, concerning to a patient of unknown age and gender. The patient’s medical history, concurrent conditions and concomitant therapies were not reported. On an unknown date, the vaccine measles, mumps, rubella and varicella (oka-merck) virus vaccine live (PROQUAD) injection experienced a temperature excursion (TE), for unknown time at unknown temperature. No previous TE reported. On 23-JAN-2025, the patient was vaccinated with the first dose of the vaccine involved in the TE measles, mumps, rubella and varicella (oka-merck) virus vaccine live (PROQUAD) injection, administered for prophylaxis (strength, dose, and route of administration were not provided; lot #Y013583 has been verified to be valid for this vaccine, expiration date reported and confirmed as 03-FEB-2026). (Product use issue). No additional adverse event was reported (No adverse event).