Could barely walk; Was cold; Severe joint pain in my knees; Worn out; Body aches; Fever/Temperature was 101/It got up to 103.3/extreme fever, felt like he was in the twilight zone/woke up with a fever of 102F/it went up to 103.4/it broke to 100; Muscle ache at every joint; Shaking/was shaking; I wasn't on this planet really; Feeling really cold; Aches and pains; Couldn't lay down/which prevented him from lying still between 3:00 AM to 8:00 AM.; Severe headache in the front; This spontaneous case was reported by a consumer and describes the occurrence of GAIT DISTURBANCE (Could barely walk), FEELING COLD (Was cold), TREMOR (Shaking/was shaking), FEELING ABNORMAL (I wasn't on this planet really) and FEELING COLD (Feeling really cold) in a 50-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 031B21A and 0021321A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 17-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 15-Apr-2021 at 10:30 AM, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. On 16-Apr-2021, the patient experienced TREMOR (Shaking/was shaking), FEELING ABNORMAL (I wasn't on this planet really), FEELING COLD (Feeling really cold), PAIN (Aches and pains), POOR QUALITY SLEEP (Couldn't lay down/which prevented him from lying still between 3:00 AM to 8:00 AM.), HEADACHE (Severe headache in the front), MYALGIA (Muscle ache at every joint), MYALGIA (Body aches) and PYREXIA (Fever/Temperature was 101/It got up to 103.3/extreme fever, felt like he was in the twilight zone/woke up with a fever of 102F/it went up to 103.4/it broke to 100). On 17-Apr-2021, the patient experienced FATIGUE (Worn out). On an unknown date, the patient experienced GAIT DISTURBANCE (Could barely walk), FEELING COLD (Was cold) and ARTHRALGIA (Severe joint pain in my knees). The patient was treated with NAPROXEN (MOTRIN [NAPROXEN]) at a dose of 1 dosage form; LIDOCAINE for Headache, Muscle ache and Pain in extremity, at a dose of 1 dosage form and PARACETAMOL (TYLENOL) for Fever, at a dose of 1 dosage form. On 19-Apr-2021, TREMOR (Shaking/was shaking), FEELING ABNORMAL (I wasn't on this planet really), FEELING COLD (Feeling really cold), PAIN (Aches and pains), POOR QUALITY SLEEP (Couldn't lay down/which prevented him from lying still between 3:00 AM to 8:00 AM.), HEADACHE (Severe headache in the front) and PYREXIA (Fever/Temperature was 101/It got up to 103.3/extreme fever, felt like he was in the twilight zone/woke up with a fever of 102F/it went up to 103.4/it broke to 100) had resolved. At the time of the report, GAIT DISTURBANCE (Could barely walk), FEELING COLD (Was cold), ARTHRALGIA (Severe joint pain in my knees), MYALGIA (Muscle ache at every joint), FATIGUE (Worn out) and MYALGIA (Body aches) outcome was unknown.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 16-Apr-2021, Body temperature: 102 (High) 102 F, 103.4 (High) 103.4 ( 97.5-97.8F) and 100 (High) at 8:30 it went to 100 F. On 17-Apr-2021, Body temperature: 95-98 (High) 95-98 F. On 18-Apr-2021, Body temperature: 99.5 (High) 99.5 F. On 19-Apr-2021, Body temperature: 97.5-97.8 (normal) 97.5-97.8 F, back to normal temperature.         Concomitant medication was not reported.  Treatment medication also included water/fluids and aleve for fever.   This case was linked to MOD-2021-080382 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 24-May-2021: Follow up received on 24-May-2021, included Additional new events and treatment medication were updated. On 23-Jul-2021: Follow received on 23-JUL-2021, included no new information. On 10-Aug-2021: Follow up information was received wherein event, event end date and event outcome was updated.