Received Apr 30, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| VARCEL | VARICELLA (VARIVAX) | MERCK & CO. INC. | 1 | Y003893 | OT / LL |
No additional AE; expired dose of VARIVAX vaccine was administered to a patient; This spontaneous report was received from an office manager and referred to a patient of unknown age and gender. The patient's medical history, concurrent conditions, and concomitant therapies were not reported. On 24-Mar-2026, the patient was vaccinated with Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) powder and solvent for solution for injection, Batch/Lot Number: Y003893 has been verified to be valid, and expiration date: 06-Feb-2026 (Expired product administered), which was reconstituted with sterile diluent (lot # and expiration date were not provided) administered as prophylaxis. No additional adverse events. Follow-up information has been received from the same reporter (Also Vaccine provider) on 09-Apr-2026. Patient's demographics were updated, this report refers to a 12-month-old female patient. This first dose of Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) was administered subcutaneously in the left thigh, at private doctor's office/hospital with private funds. The medication error (Expired product administered) occurred during administration, the staff pulled vaccine from freezer and failed to notice it had expired; was not caught until after administered. There was no product quality complaint.
Sterile diluent