Mild flu like symptoms; Body aches; Did not feel well; Slight low grade fever; Muscle aches; Fatigue; 2 weeks after the first dose; This spontaneous case was reported by a consumer and describes the occurrence of INFLUENZA LIKE ILLNESS (Mild flu like symptoms), MYALGIA (Body aches), MALAISE (Did not feel well), PYREXIA (Slight low grade fever) and MYALGIA (Muscle aches) in a 69-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 108902 and 099450) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Thrombocytopenia (Rare blood disease, a blood cancer), Diverticulitis, Gout, Bunion, Arthritis, Sleep apnea (Extreme sleep apnea on Cpap machine), Herniated disc (Herniated disc in back), Knee deformity (Knees are shot from his job), Manic depression, Anxiety disorder (Anxiety attacks), Panic disorder (Severe panic), Major depressive disorder (Recurrent episode, in partial or unspecified remission), Essential thrombocythemia since 12-May-2021, Cancer, Penicillin allergy, Allergy to antibiotic (Levofloxacin), Allergy (Contrast dye), Meat allergy and Lactose intolerance. Concomitant products included CITALOPRAM HYDROBROMIDE for Anxiety, Depression and Panic attack, HYDROXYUREA for Cancer, IRON for Essential thrombocythemia, CLONAZEPAM for Panic attack and Anxiety, ACETYLSALICYLIC ACID (ASPIRIN 81) for an unknown indication.   On 24-Apr-2021 at 12:00 PM, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 22-May-2021 at 12:30 PM, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On an unknown date, the patient experienced INFLUENZA LIKE ILLNESS (Mild flu like symptoms), MYALGIA (Body aches), MALAISE (Did not feel well), PYREXIA (Slight low grade fever), MYALGIA (Muscle aches), FATIGUE (Fatigue) and OFF LABEL USE (2 weeks after the first dose). The patient was treated with PARACETAMOL (TYLENOL) at an unspecified dose and frequency. At the time of the report, INFLUENZA LIKE ILLNESS (Mild flu like symptoms), MYALGIA (Body aches), MALAISE (Did not feel well), PYREXIA (Slight low grade fever), MYALGIA (Muscle aches) and FATIGUE (Fatigue) outcome was unknown and OFF LABEL USE (2 weeks after the first dose) had resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On 25-May-2021, Blood potassium: 6.7 (High) Potassium 6.7 mmdl/l critically high, normal high is 5.1.. On 01-Jun-2021, Blood potassium: 4.4 (normal) Potassium 4.4 mmdl/l normal.         It was reported in the follow up that patient tested potassium level 3 times and the results were normal Patient also reported that patient received the second dose after 2 weeks from the first dose.  No treatment medications were reported.   This case was linked to MOD-2021-099450, MOD-2021-099632 (Patient Link).   Most recent FOLLOW-UP information incorporated above includes: On 09-Jun-2021: Concomitant medication details updated, medical history details updated, patient details updated, event details updated  and lab details added On 09-Jun-2021: Event details updated, lab data updated