they have an opened vial that has been left outside for 12 hours , with no reported adverse event; Initial information received on 16-Jan-2025 regarding an unsolicited non-valid non-serious case received from a pharmacist. This case involves an unknown age and unknown gender patient and reporter stated that they have an opened IPV (VERO) [IPOL] vial that has been left outside for 12 hours, with no reported adverse event. The patient’s past medical history, medical treatment(s), concomitant medications, vaccination(s) and family history were not provided. On an unknown date, the suspect opened IPV (VERO) Suspension for injection (Unknown strength, lot and expiry date) for immunisation, vial that has been left outside for 12 hours, with no reported adverse event (product storage error). Pharmacist called to ask regarding multidose vials of IPOL. They wanted to know what the expiration date was for punctured vials. They said that they have an opened vial that has been left outside for 12 hours that they were going to dispose of anyway and wanted the information for reference. Pharmacist declined to report about the aforementioned IPOL. They were asking because they could not agree with their partner if they should be disposing these vials by the expiration date or after 28 days. 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.