no adverse event; HCP reports that PROQUAD was inadvertently administered after suffering from a Temperaturre excursion; This spontaneous report was received from a nurse referring to a patient of unknown age and gender. Information regarding the patient’s concurrent conditions, historical conditions and concomitant or historical medications was not provided. On 18-DEC-2024, the patient was vaccinated with Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) (rHA) injection, for prophylaxis, 0.5 milliliter per series, lot number Y013574 which has been verified t be valid, expiration date not reported but upon internal review established as 03-FEB-2026 (strength, route of administration and anatomical location not reported); and sterile diluent (MERCK STERILE DILUENT) solution for injection (strength, indication, dose, lot number, expiration date, route of administration and anatomical site not provided). On the same date, the reported stated that Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) injection was inadvertently administered after suffering from a temperature excursion, the product reached -11.6 degree celcius but previous excursions could not be confirmed, the product was out of range for 3 hours 5 minutes and 0 seconds but previous excursions could not be confirmed (Improper storage of product in use). No symptomatic adverse events were reported.