arm began to swell up and got larger; light rash; felt sore; small red circle that occurred on the same day and it gradually got bigger; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of PERIPHERAL SWELLING (arm began to swell up and got larger), VACCINATION SITE ERYTHEMA (small red circle that occurred on the same day and it gradually got bigger), INJECTION SITE RASH (light rash) and VACCINATION SITE PAIN (felt sore) in a 79-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     NO Medical History Information was reported.     On 04-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 04-Feb-2021, the patient experienced VACCINATION SITE ERYTHEMA (small red circle that occurred on the same day and it gradually got bigger). On an unknown date, the patient experienced PERIPHERAL SWELLING (arm began to swell up and got larger), INJECTION SITE RASH (light rash) and VACCINATION SITE PAIN (felt sore). At the time of the report, PERIPHERAL SWELLING (arm began to swell up and got larger), VACCINATION SITE ERYTHEMA (small red circle that occurred on the same day and it gradually got bigger), INJECTION SITE RASH (light rash) and VACCINATION SITE PAIN (felt sore) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Patient went to the ER (Emergency Room) on 12-Feb-2021 for the reported. Patient was started antibiotic treatment.   No relevant concomitant medications were reported. This case was received via an unknown source (no reference has been entered for a health authority or license partner) on 22-Feb-2021 and was forwarded to Moderna on 08-Mar-2021.    This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of PERIPHERAL SWELLING (arm began to swell up and got larger), VACCINATION SITE ERYTHEMA (small red circle that occurred on the same day and it gradually got bigger), INJECTION SITE RASH (light rash) and VACCINATION SITE PAIN (felt sore) in a 79-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination.     NO Medical History Information was reported.     On 04-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 04-Feb-2021, the patient experienced VACCINATION SITE ERYTHEMA (small red circle that occurred on the same day and it gradually got bigger). On an unknown date, the patient experienced PERIPHERAL SWELLING (arm began to swell up and got larger), INJECTION SITE RASH (light rash) and VACCINATION SITE PAIN (felt sore). At the time of the report, PERIPHERAL SWELLING (arm began to swell up and got larger), VACCINATION SITE ERYTHEMA (small red circle that occurred on the same day and it gradually got bigger), INJECTION SITE RASH (light rash) and VACCINATION SITE PAIN (felt sore) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Patient went to the ER (Emergency Room) on 12-Feb-2021 for the reported. Patient was started antibiotic treatment.   No relevant concomitant medications were reported.