nurse at their practice accidentally pulled up 2 vaccines: IPOL and Varicella into one syringe administered to a child with no reported adverse event; Initial information received on 08-Jul-2022 regarding an unsolicited valid non-serious case received from a healthcare professional.  This case involves a 5 years old female patient (Weight:21.36 kg; Height: 114 cm) to whom nurse at their practice accidentally pulled up 2 vaccines: VARICELLA VACCINE (LIVE) and IPV (VERO) [Ipol] into one syringe administered to a child with no reported adverse event.  The patient's past medical history, medical treatment(s), vaccination(s) and family history were not provided.  On an unknown date, the patient received a 5 ml dose of suspect IPV (VERO) (strength, formulation, frequency: unknown) (lot number: V1A024M expiry date: 17-Feb-2024) via intramuscular route n unknown administration site for Immunization and the patient received a 5ml dose of suspect VARICELLA VACCINE (LIVE) produced by unknown manufacturer (strength, formulation, dose, route, frequency: unknown) (lot number: uo22320  and expiry date: not reported) in unknown administration site for Prophylactic vaccination (Immunisation).  On an unknown date a non-serious event of, nurse at their practice accidentally pulled up 2 vaccines: ipol and varicella into one syringe administered to a child with no reported adverse event (wrong technique in product usage process) (unknown latency) following the administration of IPV (VERO) and VARICELLA VACCINE (LIVE).  It was reported, they are asking if the IPOL vaccine is still valid if it was administered in the same syringe as a Varicella (chickenpox) vaccine. They spoke to manufacturer, and they were told it should be fine, so they were calling to check on the IPOL. Vaccines were already administered to a child. Vaccines were already administered to a child. Reportedly, Caller in a hurry and sounding stressed. States they are management and already heard from MERCK but they want to know if they need to repeat the dose of IPOL? Caller has limited information saying, they are management. Caller knows it shouldn't have been mixed with anything but wants to know if they should re-vaccinate.   Action taken: not applicable.  At time of reporting, the outcome was Unknown.  This suspected adverse reaction report is submitted and classified as a medication error solely and exclusively to ensure the marketing authorization holder's compliance with the requirements set out in the Directive 2001/83/EC and Module VI of the Good Pharmacovigilance Practices. The classification as a medical error is in no way intended, nor should it be interpreted or construed as an allegation or claim made by the marketing authorization holder that any third party has contributed to or is to be held liable for the occurrence of this medication error.  Additional information was received on 08-Jul-2022 from a healthcare professional: Lot number and expiry date added for IPOL. Clinical course updated and text amended accordingly.  Additional  information was received on 20-JUL-2022: Patient age, gender, height and weight were added; Dose of both suspects were added and lot number for VARICELLA VACCINE (LIVE) was added. corresponding fields and narrative amended accordingly.