No additional AE; HCP called and reported administration of PROQUAD to multiple patients after a possible temperature excursion. HCP did not have complete excursion information and patient demographics were unknown. No additional information was known by reporter. No; This spontaneous report has been received from a health care professional, referring a 12-month-old patient of unknown gender. The patient’s medical history, previous adverse drug reactions, drug allergy, concurrent conditions, and concomitant medication were not provided. On 17-OCT-2024, the patient was vaccinated with Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (rHA) (PROQUAD) injection (strength, dose, frequency, route of administration, site of administration, and vaccination scheme were not provided; lot # Y002099 which has been verified to be a valid number, expiration date reported and validated as 09-JUL-2025) as a prophylaxis; which experienced a temperature excursion before administration (product storage error). However, no signs or symptoms were reported. This is one of several reports received from the same reporter.; Sender’s Comments: US-009507513-2412USA006214: US-009507513-2412USA006402: US-009507513-2412USA006216: US-009507513-2412USA006311: US-009507513-2412USA006100: US-009507513-2412USA005703: