Knot in injection site; Rash was itchy; Arm soreness; Red Rash; Red patch at injection site; Swelling to about the size of an orange; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of INJECTION SITE MASS (Knot in injection site), RASH PRURITIC (Rash was itchy), PAIN IN EXTREMITY (Arm soreness), RASH ERYTHEMATOUS (Red Rash) and VACCINATION SITE ERYTHEMA (Red patch at injection site) in an 83-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 028L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Atrial fibrillation since an unknown date and Bronchitis asthmatic since an unknown date. Concurrent medical conditions included Penicillin allergy.    On 19-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, the patient experienced INJECTION SITE MASS (Knot in injection site), RASH PRURITIC (Rash was itchy), PAIN IN EXTREMITY (Arm soreness), RASH ERYTHEMATOUS (Red Rash), VACCINATION SITE ERYTHEMA (Red patch at injection site) and VACCINATION SITE SWELLING (Swelling to about the size of an orange). At the time of the report, INJECTION SITE MASS (Knot in injection site), RASH PRURITIC (Rash was itchy), PAIN IN EXTREMITY (Arm soreness), RASH ERYTHEMATOUS (Red Rash), VACCINATION SITE ERYTHEMA (Red patch at injection site) and VACCINATION SITE SWELLING (Swelling to about the size of an orange) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       No relevant Concomitant medications were reported.   No Treatment information for the event was provided. This case was received via an unknown source (no reference has been entered for a health authority or license partner) on 28-Jan-2021 and was forwarded to Moderna on 28-Jan-2021.    This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of INJECTION SITE MASS (Knot in injection site), RASH PRURITIC (Rash was itchy), PAIN IN EXTREMITY (Arm soreness), RASH ERYTHEMATOUS (Red Rash) and VACCINATION SITE ERYTHEMA (Red patch at injection site) in an 83-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 028L20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Atrial fibrillation since an unknown date and Bronchitis asthmatic since an unknown date. Concurrent medical conditions included Penicillin allergy.    On 19-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, the patient experienced INJECTION SITE MASS (Knot in injection site), RASH PRURITIC (Rash was itchy), PAIN IN EXTREMITY (Arm soreness), RASH ERYTHEMATOUS (Red Rash), VACCINATION SITE ERYTHEMA (Red patch at injection site) and VACCINATION SITE SWELLING (Swelling to about the size of an orange). At the time of the report, INJECTION SITE MASS (Knot in injection site), RASH PRURITIC (Rash was itchy), PAIN IN EXTREMITY (Arm soreness), RASH ERYTHEMATOUS (Red Rash), VACCINATION SITE ERYTHEMA (Red patch at injection site) and VACCINATION SITE SWELLING (Swelling to about the size of an orange) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       No relevant Concomitant medications were reported.   No Treatment information for the event was provided.