No additional adverse event was reported; the needle and it instead came off the syringe and caused a needle stick in the staff members left hand.; CALLER CONFIRMED JUST THE NEEDLE CAME OFF, NO PART OF THE SYRINGE CAME OFF/ needle pooped off; Was the product administered or exposed to patient’s bodily fluids (i.e. biohazardous)? YES; Was the product administered or exposed to patient’s bodily fluids (i.e. biohazardous)? YES; device connection issue; Poor quality device used; This spontaneous report was received from registered nurse and refers to a 30-year-old female. The patient’s medical history was not reported. The patient’s concurrent conditions were not reported. Concomitant therapies were not reported. On 21-JAN-2025, the patient was vaccinated with sterile diluent (BAXTER STERILE DILUENT) solution for injection/infusion, unk, lot #1973259, expiration date: 03-MAR-2026 (strength, route of administration, and indication were not provided); and measles, mumps, and rubella (wistar ra 27-3) virus vaccine, live (M-M-R II) injection, unk, lot #X026222, expiration date: 06-NOV-2025, administered for prophylaxis (strength, and route of administration were not provided). The reporter stated that the needle popped off a diluent syringe after it was used to administered a vaccine. The problem occurred when the staff member tried to engage the safety on the needle and it instead came off the syringe and caused a needle stick in the staff member left hand (Injury associated with device, needle issue, device connection issue and poor quality device used). The product was administered to the patients body fluids (Occupational exposure to product and accidental exposure to product). No additional adverse event was reported.