data logger usually logs the temperature twice a day but for some reason, on 23dec2024, it did not pick up on the temperature excursion at 46.5 degrees f for 15 minutes with no reported ae; Initial information received on 14-Jan-2025 regarding an unsolicited valid non-serious case received from a other health professional. This case involves a 10 years old female patient who received IPV (VERO) [IPOL] which was exposed to temperature excursion due to data logger usually logs the temperature twice a day but for some reason, it did not pick up on the temperature excursion at 46.5 degrees f for 15 minutes with no reported adverse event. The patient’s past medical history, medical treatment(s), vaccination(s) and family history were not provided. Concomitant medications included measles vaccine, mumps vaccine, rubella vaccine (MMR) for Immunisation; Varicella zoster vaccine (Varicella vaccine) for Immunisation; Diphtheria vaccine toxoid, Pertussis vaccine acellular, Tetanus vaccine toxoid (Tdap) for Immunisation; Influenza vaccine (Influenza) for Immunisation; and HEPATITIS B VACCINE (HEPATITIS B VACCINE) for Immunisation. On 09-Jan-2025, the patient received 0.5 ml of dose 2 of IPV (VERO) Suspension for injection (strength- standard, expiry date- 31-Oct-2026 and lot X1C891M) once via intramuscular route in the right deltoid as Immunization which was exposed to temperature excursion due to data logger usually logs the temperature twice a day but for some reason, it did not pick up on the temperature excursion at 46.5 degrees f for 15 minutes with no reported adverse event (Poor quality product administered) (latency- same day). 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.