No symptomatic adverse events were reported. No additional AE; The HCP reports that VARIVAX was inadvertently administered after suffering from a Temperature Excursion.; This spontaneous report was received from a nurse and refers to a patient of an unknown age and gender. The patient’s pertinent medical history, concurrent conditions, drug reactions or allergies, and concomitant therapies were not reported. Concomitant medications included sterile diluent (MERCK STERILE DILUENT). On 17-DEC-2024, the patient was vaccinated with an improperly stored dose of varicella virus vaccine live (Oka/Merck) (VARIVAX) injection, 0.5 milliliter, lot # Y006522; which has been verified to be valid lot # for varicella virus vaccine live (Oka/Merck), expiration date: 25-MAR-2026, administered as prophylaxis (strength, dose number, route, anatomical location of administration and vaccination scheme frequency were not provided) (product storage error) after a temperature excursion (TE) occurred at a temperature of -11.6 C degrees Celsius during a time frame of 3 hours 5 minutes and 0 seconds. Previous temperature excursions could not be confirmed. No additional adverse event (AE) was reported (no adverse event). This is one of several reports received from the same reporter.; Sender’s Comments: US-009507513-2501USA008877: US-009507513-2501USA009045: US-009507513-2501USA008880: US-009507513-2501USA008882:02740767 US-009507513-2501USA007446: US-009507513-2501USA008935: US-009507513-2501USA007047: US-009507513-2501USA008861: