Joints were stiffening which resulted in surgery; Respiratory reaction-sounded like severe cold/flu; Pain like his arm and legs are being ripped off; sounded like severe cold/flu; Joints were very painful; Muscle ache; Fever of 102 degrees F; Severe migraine like headache; This spontaneous case was reported by a consumer and describes the occurrence of JOINT STIFFNESS (Joints were stiffening which resulted in surgery) in a 38-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.    On 13-Mar-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 JOINT STIFFNESS (Joints were stiffening which resulted in surgery) (seriousness criterion medically significant), RESPIRATORY DISORDER (Respiratory reaction-sounded like severe cold/flu), PAIN (Pain like his arm and legs are being ripped off), INFLUENZA LIKE ILLNESS (sounded like severe cold/flu), MIGRAINE (Severe migraine like headache), ARTHRALGIA (Joints were very painful), MYALGIA (Muscle ache) and PYREXIA (Fever of 102 degrees F). The patient was treated with Surgery for Joint stiffness. On 20-Mar-2021, MIGRAINE (Severe migraine like headache) had resolved. At the time of the report, JOINT STIFFNESS (Joints were stiffening which resulted in surgery), RESPIRATORY DISORDER (Respiratory reaction-sounded like severe cold/flu), PAIN (Pain like his arm and legs are being ripped off), INFLUENZA LIKE ILLNESS (sounded like severe cold/flu), ARTHRALGIA (Joints were very painful), MYALGIA (Muscle ache) and PYREXIA (Fever of 102 degrees F) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Body temperature: 102 degrees f (High) developed fever.     The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       No relevant concomitant medications were reported.  The patient got the first dose of Moderna vaccine on Saturday 13-Mar-2021 in his left arm and was awfully sick for 3 days. He developed fever of 102 degree Fahrenheit, muscle ache and pain like his arm and legs are being ripped off, joints were very painful, also had a respiratory reaction. It sounded like severe cold/flu. He was in the bed for straight 2 days. He returned to work on Wednesday but he had severe migraine like headache until Saturday which was 7 days later. He was very nervous about taking the second shot. He took may be Aleve or Tylenol. He was afraid to lose work and needs to take second shot.  Company Comment: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.   Most recent FOLLOW-UP information incorporated above includes: On 10-May-2021: Follow up received on 10-May-2021 added new event joint stiffness.; Sender's Comments: Based on the current available information and temporal association between the use of the product and the start date of the events, a causal relationship cannot be excluded.