mistakenly gave an extra dose of the Bivalent booster vaccine; The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error; The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error; No adverse reaction; This spontaneous case was reported by a pharmacist and describes the occurrence of EXTRA DOSE ADMINISTERED (mistakenly gave an extra dose of the Bivalent booster vaccine), EXPIRED PRODUCT ADMINISTERED (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error), PRODUCT STORAGE ERROR (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error) and NO ADVERSE EVENT (No adverse reaction) in a male patient of an unknown age who received mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) 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, received dose of mRNA-1273 BIVALENT .222 (MODERNA COVID-19 VACCINE, BIVALENT (ORIGINAL AND OMICRON BA.4/BA.5)) (unknown route) dosage was changed to 1 dosage form. On an unknown date, the patient experienced EXTRA DOSE ADMINISTERED (mistakenly gave an extra dose of the Bivalent booster vaccine). an unknown date, the patient experienced EXPIRED PRODUCT ADMINISTERED (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error), PRODUCT STORAGE ERROR (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error) and NO ADVERSE EVENT (No adverse reaction). At the time of the report, EXTRA DOSE ADMINISTERED (mistakenly gave an extra dose of the Bivalent booster vaccine), EXPIRED PRODUCT ADMINISTERED (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error), PRODUCT STORAGE ERROR (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error) and NO ADVERSE EVENT (No adverse reaction) 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 reaction) to be not related. No further causality assessments were provided for EXTRA DOSE ADMINISTERED (mistakenly gave an extra dose of the Bivalent booster vaccine), EXPIRED PRODUCT ADMINISTERED (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error) and PRODUCT STORAGE ERROR (The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error).    No concomitant medications were reported.   It was reported that, the patient mistakenly received an extra dose of bivalent booster vaccine 2 days after he received his normal bivalent vaccine booster dose. The second dose that was given was left drawn up in a syringe for the entire 48 hours prior to the administration error.  No treatment details were reported.