sore left arm; red area of some couple of inches around the injection site; a little swollen; hard to touch but not painful; This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (sore left arm), VACCINATION SITE ERYTHEMA (red area of some couple of inches around the injection site), SWELLING (a little swollen) and MUSCLE RIGIDITY (hard to touch but not painful) in a 79-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 010M20A) for COVID-19 vaccination.     The patient's past medical history included Hypertension since an unknown date. Concomitant products included THYROID for an unknown indication.    On 04-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 12-Feb-2021, the patient experienced VACCINATION SITE ERYTHEMA (red area of some couple of inches around the injection site), SWELLING (a little swollen) and MUSCLE RIGIDITY (hard to touch but not painful). On an unknown date, the patient experienced PAIN IN EXTREMITY (sore left arm). The patient was treated with PARACETAMOL (TYLENOL) for Adverse event, at an unspecified dose and frequency. At the time of the report, PAIN IN EXTREMITY (sore left arm), VACCINATION SITE ERYTHEMA (red area of some couple of inches around the injection site), SWELLING (a little swollen) and MUSCLE RIGIDITY (hard to touch but not painful) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       Concomitant medications reported were blood pressure medication, Thyroid medication, and blood thinner for drug use for unknown indication. This case was received via an unknown source (no reference has been entered for a health authority or license partner) on 12-Feb-2021 and was forwarded to Moderna on 12-Feb-2021.    This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (sore left arm), VACCINATION SITE ERYTHEMA (red area of some couple of inches around the injection site), SWELLING (a little swollen) and MUSCLE RIGIDITY (hard to touch but not painful) in a 79-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 010M20A) for COVID-19 vaccination.     The patient's past medical history included Hypertension since an unknown date. Concomitant products included THYROID for an unknown indication.    On 04-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 12-Feb-2021, the patient experienced VACCINATION SITE ERYTHEMA (red area of some couple of inches around the injection site), SWELLING (a little swollen) and MUSCLE RIGIDITY (hard to touch but not painful). On an unknown date, the patient experienced PAIN IN EXTREMITY (sore left arm). The patient was treated with PARACETAMOL (TYLENOL) for Adverse event, at an unspecified dose and frequency. At the time of the report, PAIN IN EXTREMITY (sore left arm), VACCINATION SITE ERYTHEMA (red area of some couple of inches around the injection site), SWELLING (a little swollen) and MUSCLE RIGIDITY (hard to touch but not painful) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       Concomitant medications reported were blood pressure medication, Thyroid medication, and blood thinner for drug use for unknown indication.