No adverse event; A pharmacy staff reports that they inadvertently administered 51 doses of the monovalent vaccines/ expiration date 13Jul2022 Date(s) of administration of vaccine were -26Jul2022; This spontaneous case was reported by an other health care professional and describes the occurrence of EXPIRED PRODUCT ADMINISTERED (A pharmacy staff reports that they inadvertently administered 51 doses of the monovalent vaccines/ expiration date 13Jul2022 Date(s) of administration of vaccine were -26Jul2022) and NO ADVERSE EVENT (No adverse event) in a 101-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 004M21A, 014F21A, 030L20A and 025L20A) for COVID-19 prophylaxis.     It was unknown the patient ever been diagnosed with or tested positive for COVID-19. It was unknown that acute illnesses at the time of vaccination and up to one month before.  It was unknown that patient had chronic or long-standing health conditions.    On 11-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 08-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 02-Nov-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 26-Jul-2022, received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to .25 milliliter. On 26-Jul-2022, the patient experienced EXPIRED PRODUCT ADMINISTERED (A pharmacy staff reports that they inadvertently administered 51 doses of the monovalent vaccines/ expiration date 13Jul2022 Date(s) of administration of vaccine were -26Jul2022). On an unknown date, the patient experienced NO ADVERSE EVENT (No adverse event). At the time of the report, EXPIRED PRODUCT ADMINISTERED (A pharmacy staff reports that they inadvertently administered 51 doses of the monovalent vaccines/ expiration date 13Jul2022 Date(s) of administration of vaccine were -26Jul2022) and NO ADVERSE EVENT (No adverse event) outcome was unknown.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter considered NO ADVERSE EVENT (No adverse event) to be not related. No further causality assessment was provided for EXPIRED PRODUCT ADMINISTERED (A pharmacy staff reports that they inadvertently administered 51 doses of the monovalent vaccines/ expiration date 13Jul2022 Date(s) of administration of vaccine were -26Jul2022).    It was unknown that patient had prescriptions, over the counter medications, dietary supplements or herbal remedies being taken at the time of vaccination or at the time of adverse event.  Pharmacy staff reported that they inadvertently administered 51 doses of the monovalent vaccines. Lot number 004M21A, expiration date 13Jul2022 Dates of administration of vaccine were 26Jul2022 (40 doses), 04Aug2022 (1 dose), 19Aug2022 (1 dose), 30Sep2022 (1 dose).  No treatment medication was reported.   This case was linked to MODERNATX, INC.-MOD-2023-704260 (E2B Linked Report).   Most recent FOLLOW-UP information incorporated above includes: On 02-Feb-2023: Follow up received contains significant information. Reporter information was updated. Route of administration and vaccination site of suspect product was updated. Sender's Comments:  MODERNATX, INC.-MOD-2023-704260:Master Case