Patient received dose from a vial which was initially stored in the refrigerator 25-Apr-2022 and administered to patient on 25-Apr-22, after manufacturer date of expiry 24-Apr-2022; patient was administered with an expired dose; 0.5mL of booster dose was administered; This spontaneous case was reported by a nurse and describes the occurrence of EXPIRED PRODUCT ADMINISTERED (patient was administered with an expired dose), ACCIDENTAL OVERDOSE (0.5mL of booster dose was administered) and PRODUCT STORAGE ERROR (Patient received dose from a vial which was initially stored in the refrigerator 25-Apr-2022 and administered to patient on 25-Apr-22, after manufacturer date of expiry 24-Apr-2022) in a 64-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 022J21A, 019F21A, 030L20A and 025J20A) for COVID-19 vaccination.     No Medical History information was reported.   On 07-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) .5 milliliter. On 04-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to .5 milliliter. On 09-Nov-2021, received third dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to .25 milliliter. On 25-Apr-2022 at 3:05 PM, received fourth dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to .5 milliliter. On 25-Apr-2022,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced ACCIDENTAL OVERDOSE (0.5mL of booster dose was administered). On 25-Apr-2022 at 3:05 PM, the patient experienced EXPIRED PRODUCT ADMINISTERED (patient was administered with an expired dose). On an unknown date, the patient experienced PRODUCT STORAGE ERROR (Patient received dose from a vial which was initially stored in the refrigerator 25-Apr-2022 and administered to patient on 25-Apr-22, after manufacturer date of expiry 24-Apr-2022). At the time of the report, EXPIRED PRODUCT ADMINISTERED (patient was administered with an expired dose), ACCIDENTAL OVERDOSE (0.5mL of booster dose was administered) and PRODUCT STORAGE ERROR (Patient received dose from a vial which was initially stored in the refrigerator 25-Apr-2022 and administered to patient on 25-Apr-22, after manufacturer date of expiry 24-Apr-2022) outcome was unknown.        For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter considered EXPIRED PRODUCT ADMINISTERED (patient was administered with an expired dose) and ACCIDENTAL OVERDOSE (0.5mL of booster dose was administered) to be related. No further causality assessment was provided for PRODUCT STORAGE ERROR (Patient received dose from a vial which was initially stored in the refrigerator 25-Apr-2022 and administered to patient on 25-Apr-22, after manufacturer date of expiry 24-Apr-2022).    The race of the patient was reported.  Concomitant medication was not reported.  The vials were initially stored in refrigerator on 25-Apr-2022. The vials had not undergone temperature excursion. It was reported Moderna booster was given on 25-Apr-2022, thinking that expiration date was 26-Apr-2022. Later noticed that vaccine expiration date was 24-Apr-2022.  No treatment medication was not reported.