Leg pain; dizziness; experiencing muscle pain in his knee and lower calf; joint pain; low grade fever; This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (Leg pain), DIZZINESS (dizziness), MYALGIA (experiencing muscle pain in his knee and lower calf), ARTHRALGIA (joint pain) and PYREXIA (low grade fever) in a 78-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 011J20A and 037620A) for COVID-19 vaccination.     NO Medical History Information was reported.    On 06-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 03-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 03-Feb-2021, the patient experienced DIZZINESS (dizziness), MYALGIA (experiencing muscle pain in his knee and lower calf), ARTHRALGIA (joint pain) and PYREXIA (low grade fever). On 05-Feb-2021, the patient experienced PAIN IN EXTREMITY (Leg pain). On 05-Feb-2021, DIZZINESS (dizziness) had resolved. At the time of the report, PAIN IN EXTREMITY (Leg pain) was resolving and MYALGIA (experiencing muscle pain in his knee and lower calf), ARTHRALGIA (joint pain) and PYREXIA (low grade fever) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 05-Feb-2021, Ultrasound Doppler: (Negative) Doppler exam was negative for blood clot..         No relevant Concomitant medications were reported.   No Treatment information for the event was provided.   This case was linked to MOD-2021-021188 (Patient Link). This case was received via an unknown source (no reference has been entered for a health authority or license partner) on 05-Feb-2021 and was forwarded to Moderna on 05-Feb-2021.    This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (Leg pain), DIZZINESS (dizziness), MYALGIA (experiencing muscle pain in his knee and lower calf), ARTHRALGIA (joint pain) and PYREXIA (low grade fever) in a 78-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 011J20A and 037620A) for COVID-19 vaccination.     NO Medical History Information was reported.    On 06-Jan-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 03-Feb-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 03-Feb-2021, the patient experienced DIZZINESS (dizziness), MYALGIA (experiencing muscle pain in his knee and lower calf), ARTHRALGIA (joint pain) and PYREXIA (low grade fever). On 05-Feb-2021, the patient experienced PAIN IN EXTREMITY (Leg pain). On 05-Feb-2021, DIZZINESS (dizziness) had resolved. At the time of the report, PAIN IN EXTREMITY (Leg pain) was resolving and MYALGIA (experiencing muscle pain in his knee and lower calf), ARTHRALGIA (joint pain) and PYREXIA (low grade fever) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 05-Feb-2021, Ultrasound Doppler: (Negative) Doppler exam was negative for blood clot..         No relevant Concomitant medications were reported.   No Treatment information for the event was provided.   This case was linked to MOD-2021-021188 (Patient Link).