This spontaneous case was reported by a pharmacist and describes the occurrence of EXPIRED PRODUCT ADMINISTERED (10 doses of bivalentvaccine were given from vials beyond their recommended use date/10 patients who received Moderna Bivalent Covid-19 vaccine between May 1 and May 7 that was past it's use by date of April 29, 2023), PRODUCT STORAGE ERROR (The vials had been moved from our freezer to the refrigerator on 3/31/23 and administered on 01-May-2023.) and NO ADVERSE EVENT (No adverse event) in an adult patient of an unknown gender who received mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) (batch no. 027E22A) for COVID-19 prophylaxis.     No Medical History information was reported.  On an unknown date, the patient received dose of mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) (unknown route) 1 dosage form. On an unknown date, the patient experienced EXPIRED PRODUCT ADMINISTERED (10 doses of bivalentvaccine were given from vials beyond their recommended use date/10 patients who received Moderna Bivalent Covid-19 vaccine between May 1 and May 7 that was past it's use by date of April 29, 2023), PRODUCT STORAGE ERROR (The vials had been moved from our freezer to the refrigerator on 3/31/23 and administered on 01-May-2023.) and NO ADVERSE EVENT (No adverse event). At the time of the report, EXPIRED PRODUCT ADMINISTERED (10 doses of bivalentvaccine were given from vials beyond their recommended use date/10 patients who received Moderna Bivalent Covid-19 vaccine between May 1 and May 7 that was past it's use by date of April 29, 2023), PRODUCT STORAGE ERROR (The vials had been moved from our freezer to the refrigerator on 3/31/23 and administered on 01-May-2023.) and NO ADVERSE EVENT (No adverse event) outcome was unknown.     For mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) (Unknown), the reporter considered NO ADVERSE EVENT (No adverse event) to be not related. No further causality assessments were provided for EXPIRED PRODUCT ADMINISTERED (10 doses of bivalentvaccine were given from vials beyond their recommended use date/10 patients who received Moderna Bivalent Covid-19 vaccine between May 1 and May 7 that was past it's use by date of April 29, 2023) and PRODUCT STORAGE ERROR (The vials had been moved from our freezer to the refrigerator on 3/31/23 and administered on 01-May-2023.).    Concomitant product use was not provided by the reporter.  Approximately 10 doses of bivalent vaccine were given from vials beyond their recommended use date. The vials had been moved from freezer to the refrigerator on 31-Mar-2023. 10 Doses were given between 1-May-2023 and 7-May-2023 from these vials. The vaccine expiration date was reported as 18-May-2023.   10 patients who received Moderna Bivalent Covid-19 vaccine was past its use by date of 29-Apr-2023.  The remaining vials were quarantined and salvaged out of our inventory.   Treatment information was not provided.  This case was reported for 4th patient out of 10.   This case was linked to US-MODERNATX, INC.-MOD-2023-723501 (E2B Linked Report).   Most recent FOLLOW-UP information incorporated above includes: On 09-May-2023: Live follow-up information received included Date of start of reaction/event and Narrative updated.; Sender's Comments:  US-MODERNATX, INC.-MOD-2023-723501:Patient no. 1 (Master case)