red arm - at the injection site - left arm; swollen arm - at the injection site - left arm; had heat in it - at the injection site - left arm; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE ERYTHEMA (red arm - at the injection site - left arm), VACCINATION SITE SWELLING (swollen arm - at the injection site - left arm) and VACCINATION SITE WARMTH (had heat in it - at the injection site - left arm) in an 80-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 031LZ0A) for COVID-19 vaccination.     No Medical History Information was reported.     On 18-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, the patient experienced VACCINATION SITE ERYTHEMA (red arm - at the injection site - left arm), VACCINATION SITE SWELLING (swollen arm - at the injection site - left arm) and VACCINATION SITE WARMTH (had heat in it - at the injection site - left arm). The patient was treated with PARACETAMOL (TYLENOL) for Adverse event, at an unspecified dose and frequency and DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]) for Adverse event, at an unspecified dose and frequency. At the time of the report, VACCINATION SITE ERYTHEMA (red arm - at the injection site - left arm), VACCINATION SITE SWELLING (swollen arm - at the injection site - left arm) and VACCINATION SITE WARMTH (had heat in it - at the injection site - left arm) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   No relevant concomitant medications were reported.   This case was linked to MOD-2021-020389 (Patient Link). 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 22-Feb-2021.    This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE ERYTHEMA (red arm - at the injection site - left arm), VACCINATION SITE SWELLING (swollen arm - at the injection site - left arm) and VACCINATION SITE WARMTH (had heat in it - at the injection site - left arm) in an 80-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 031LZ0A) for COVID-19 vaccination.     No Medical History Information was reported.     On 18-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On an unknown date, the patient experienced VACCINATION SITE ERYTHEMA (red arm - at the injection site - left arm), VACCINATION SITE SWELLING (swollen arm - at the injection site - left arm) and VACCINATION SITE WARMTH (had heat in it - at the injection site - left arm). The patient was treated with PARACETAMOL (TYLENOL) for Adverse event, at an unspecified dose and frequency and DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]) for Adverse event, at an unspecified dose and frequency. At the time of the report, VACCINATION SITE ERYTHEMA (red arm - at the injection site - left arm), VACCINATION SITE SWELLING (swollen arm - at the injection site - left arm) and VACCINATION SITE WARMTH (had heat in it - at the injection site - left arm) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown), the reporter did not provide any causality assessments.   No relevant concomitant medications were reported.   This case was linked to MOD-2021-020389 (Patient Link).