Left arm sore; joint pain; excruciating pain and stiffness on left side of neck (couldn't move head); excruciating pain and stiffness on left side of neck (couldn't move head); This spontaneous case was reported by a consumer and describes the occurrence of PAIN IN EXTREMITY (Left arm sore), ARTHRALGIA (joint pain), NECK PAIN (excruciating pain and stiffness on left side of neck (couldn't move head)) and MUSCULOSKELETAL STIFFNESS (excruciating pain and stiffness on left side of neck (couldn't move head)) in a 61-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 018M20A) for COVID-19 vaccination.     No Medical History Information was reported.  Concomitant products included ROSUVASTATIN CALCIUM (CRESTOR) and CICLOSPORIN (RESTASIS) for an unknown indication.    On 12-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, the patient experienced PAIN IN EXTREMITY (Left arm sore), ARTHRALGIA (joint pain), NECK PAIN (excruciating pain and stiffness on left side of neck (couldn't move head)) and MUSCULOSKELETAL STIFFNESS (excruciating pain and stiffness on left side of neck (couldn't move head)). The patient was treated with PREDNISONE for Adverse event, at an unspecified dose and frequency. At the time of the report, PAIN IN EXTREMITY (Left arm sore), ARTHRALGIA (joint pain), NECK PAIN (excruciating pain and stiffness on left side of neck (couldn't move head)) and MUSCULOSKELETAL STIFFNESS (excruciating pain and stiffness on left side of neck (couldn't move head)) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       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 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 PAIN IN EXTREMITY (Left arm sore), ARTHRALGIA (joint pain), NECK PAIN (excruciating pain and stiffness on left side of neck (couldn't move head)) and MUSCULOSKELETAL STIFFNESS (excruciating pain and stiffness on left side of neck (couldn't move head)) in a 61-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 018M20A) for COVID-19 vaccination.     No Medical History Information was reported.  Concomitant products included ROSUVASTATIN CALCIUM (CRESTOR) and CICLOSPORIN (RESTASIS) for an unknown indication.    On 12-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On an unknown date, the patient experienced PAIN IN EXTREMITY (Left arm sore), ARTHRALGIA (joint pain), NECK PAIN (excruciating pain and stiffness on left side of neck (couldn't move head)) and MUSCULOSKELETAL STIFFNESS (excruciating pain and stiffness on left side of neck (couldn't move head)). The patient was treated with PREDNISONE for Adverse event, at an unspecified dose and frequency. At the time of the report, PAIN IN EXTREMITY (Left arm sore), ARTHRALGIA (joint pain), NECK PAIN (excruciating pain and stiffness on left side of neck (couldn't move head)) and MUSCULOSKELETAL STIFFNESS (excruciating pain and stiffness on left side of neck (couldn't move head)) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.       No Treatment information for the event was provided.