This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE ERYTHEMA (redness on my left arm/ about 4.5 inches long and about 2.5 inches wide/ about a half inch down from where the needle went and then down) and VACCINATION SITE PAIN (The arm is sorer than the first time) in an 80-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 016M20A and 013L20A) for COVID-19 vaccination.     NO Medical History Information was reported.    On 12-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 09-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 11-Feb-2021, the patient experienced VACCINATION SITE ERYTHEMA (redness on my left arm/ about 4.5 inches long and about 2.5 inches wide/ about a half inch down from where the needle went and then down) and VACCINATION SITE PAIN (The arm is sorer than the first time). At the time of the report, VACCINATION SITE ERYTHEMA (redness on my left arm/ about 4.5 inches long and about 2.5 inches wide/ about a half inch down from where the needle went and then down) and VACCINATION SITE PAIN (The arm is sorer than the first time) outcome was unknown. Not Provided      For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No relevant concomitant medications were reported.  No treatment medication was reported. This case was received via an unknown source (no reference has been entered for a health authority or license partner) on 10-Feb-2021 and was forwarded to Moderna on 11-Feb-2021.    This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE ERYTHEMA (redness on my left arm/ about 4.5 inches long and about 2.5 inches wide/ about a half inch down from where the needle went and then down) and VACCINATION SITE PAIN (The arm is sorer than the first time) in an 80-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 016M20A and 013L20A) for COVID-19 vaccination.     NO Medical History Information was reported.    On 12-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 09-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 11-Feb-2021, the patient experienced VACCINATION SITE ERYTHEMA (redness on my left arm/ about 4.5 inches long and about 2.5 inches wide/ about a half inch down from where the needle went and then down) and VACCINATION SITE PAIN (The arm is sorer than the first time). At the time of the report, VACCINATION SITE ERYTHEMA (redness on my left arm/ about 4.5 inches long and about 2.5 inches wide/ about a half inch down from where the needle went and then down) and VACCINATION SITE PAIN (The arm is sorer than the first time) outcome was unknown. Not Provided      For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   No relevant concomitant medications were reported.  No treatment medication was reported.