Adult patients received Expired Monovalent dose of Moderna COVID-19 vaccine 19SEP2022 until 09NOV2022. 9 Boosters 3rd dose and 3 second doses (Lot# 051B22A & Exp. Date: unknown); The vial was initially stored in the refrigerator on 06-Jul-2022; No adverse event; This spontaneous case was reported by an other health care professional and describes the occurrence of EXPIRED PRODUCT ADMINISTERED (Adult patients received Expired Monovalent dose of Moderna COVID-19 vaccine 19SEP2022 until 09NOV2022. 9 Boosters 3rd dose and 3 second doses (Lot# 051B22A & Exp. Date: unknown)), PRODUCT STORAGE ERROR (The vial was initially stored in the refrigerator on 06-Jul-2022) and NO ADVERSE EVENT (No adverse event) in an adult patient of an unknown gender who received mRNA-1273 (Spikevax) (batch no. 051B22A) for COVID-19 prophylaxis.     No Medical History information was reported.    On an unknown date, the patient received second dose of mRNA-1273 (Spikevax) (unknown route) 1 dosage form. On an unknown date, the patient experienced EXPIRED PRODUCT ADMINISTERED (Adult patients received Expired Monovalent dose of Moderna COVID-19 vaccine 19SEP2022 until 09NOV2022. 9 Boosters 3rd dose and 3 second doses (Lot# 051B22A & Exp. Date: unknown)), PRODUCT STORAGE ERROR (The vial was initially stored in the refrigerator on 06-Jul-2022) and NO ADVERSE EVENT (No adverse event). At the time of the report, EXPIRED PRODUCT ADMINISTERED (Adult patients received Expired Monovalent dose of Moderna COVID-19 vaccine 19SEP2022 until 09NOV2022. 9 Boosters 3rd dose and 3 second doses (Lot# 051B22A & Exp. Date: unknown)), PRODUCT STORAGE ERROR (The vial was initially stored in the refrigerator on 06-Jul-2022) and NO ADVERSE EVENT (No adverse event) outcome was unknown.        For mRNA-1273 (Spikevax) (Unknown), the reporter considered NO ADVERSE EVENT (No adverse event) to be not related. No further causality assessments were provided for EXPIRED PRODUCT ADMINISTERED (Adult patients received Expired Monovalent dose of Moderna COVID-19 vaccine 19SEP2022 until 09NOV2022. 9 Boosters 3rd dose and 3 second doses (Lot# 051B22A & Exp. Date: unknown)) and PRODUCT STORAGE ERROR (The vial was initially stored in the refrigerator on 06-Jul-2022).    No concomitant medications were reported.  It was reported that 3 Monovalent vials of Moderna COVID-19 vaccine in the freezer moved to the refrigerator on 06-Jul-2022 which had beyond use date of 05-Aug-2022. 12 Adult patients received expired monovalent dose of Moderna COVID-19 vaccine from 19-Sep-2022 till 09-Nov-2022, out of which 9 were 3rd booster doses and 3 were second doses. There were no previous excursions happened. There were individual vials of unknown size. The vial was initially stored in the refrigerator on 06-Jul-2022. The doses were administered as 6 patients on 19-Sep-2022, 2 patients on 04-Oct-2022 and 1 patient on 09-Nov-2022.  The vial did not undergo any temperature excursions.  No treatment details were reported. This case contains information for the 7 of 12 adult patients described by the reporter.   This case was linked to US-MODERNATX, INC.-MOD-2023-720531 (E2B Linked Report).; Sender's Comments:  US-MODERNATX, INC.-MOD-2023-720531: