Received Dec 8, 2025
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| MMRV | MEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD) | MERCK & CO. INC. | UNK | Z010379 | — |
| VARCEL | VARICELLA (VARIVAX) | MERCK & CO. INC. | UNK | Z003883 | — |
No additional AE; patient was accidently administered VARIVAX and PROQUAD on Nov 22, 2025; patient was suppose to receive mmr and VARIVAX; This spontaneous report was received from a medical assistant and refers to a 1-year-old female patient. The patient's medical history was not reported. The patient's concurrent conditions were not reported. Concomitant therapies were not reported. On 22-Nov-2025, the patient was accidentally administered Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX) (lot #Z003883, expiration date: 03-Feb-2027), 0.5 mL, and Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) (lot #Z010379, expiration date: 14-Dec-2026), 0.5 mL, administered for prophylaxis (strength and route of both vaccines were not reported) (Overdose). The vaccine was reconstituted with sterile diluent (Hollister-Stier STERILE DILUENT) (lot # and expiration date were not). Medical assistant explained that patient was supposed to receive Measles, Mumps, and Rubella (Wistar RA 27-3) Virus Vaccine, Live (manufacturer unknown) and Varicella Virus Vaccine Live (Oka-Merck) (VARIVAX), but the person who administered the products did not fully read the Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) label to see that Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD) contained measles, mumps, rubella and varicella (Wrong product administered). No additional information was provided. No additional adverse event was reported.
sterile diluent