Received May 25, 2026
| Type | Name | Manufacturer | Dose | Lot | Route / Site |
|---|---|---|---|---|---|
| MMRV | MEASLES + MUMPS + RUBELLA + VARICELLA (PROQUAD) | MERCK & CO. INC. | UNK | Z015275 | — |
The mother informed that her child had slightly elevated fever; she was informed by her child's medical practice facility that her child received PROQUAD that was improperly stored in refrigerator for 2 weeks and lost its potency; she was informed by her child's medical practice facility that her child received PROQUAD that was improperly stored in refrigerator for 2 weeks and lost its potency; This spontaneous report was received from a consumer or other non-health professional and refers to a child patient of unknown gender. Information regarding the patient's concurrent conditions, medical history, or concomitant medications was not provided. On 27-Feb-2026, the patient was vaccinated with an improperly storage and lost its potency dose of Measles, Mumps, Rubella and Varicella (Oka-Merck) Virus Vaccine Live (PROQUAD), 0.5 ml (lot number Z015275, which was verified to be valid, expiration date established on 30-Mar-2027) the suspect vaccine was reconstituted with sterile diluent (Hollister-Stier), (dose, lot number and expiration date were not reported) for prevention of measles, mumps, rubella, and varicella (Product storage issue, Drug ineffective). The mother informed that her child had slightly elevated fever (Pyrexia). At the reporting time, the outcome of pyrexia was unknown. The causal relationship between the event of Pyrexia and the suspect vaccine was not provided.