Bright red at injection site /redness; Joint pain in the left arm; Headache; Arm still swollen; Hot to touch at injection site; Brain frog; Pain all over upper arm/ Left arm pain; Redness; Pain at the injection site; This spontaneous case was reported by a consumer and describes the occurrence of VACCINATION SITE WARMTH (Hot to touch at injection site), PAIN IN EXTREMITY (Pain all over upper arm/ Left arm pain), ERYTHEMA (Redness), FEELING ABNORMAL (Brain frog) and VACCINATION SITE PAIN (Pain at the injection site) in a 79-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch no. 002A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     The patient's past medical history included Pneumonia, Shingles, Colonic polyp (Colon polyps), Rotator cuff repair (Left shoulder) on 26-Feb-1998, Tonsillectomy, Cystoscopy, Colonoscopy in 2012, Skin cancer excision (Removal of pre skin cancer on arm.), Appendectomy (Ruptured), Uterine dilation and curettage and Laparoscopic colectomy (Laparoscopic cholecystectomy (LAP CHOLE)). Concurrent medical conditions included Allergy to antibiotic (Tetracycline cause swelling.) since 30-Sep-2015, Sulfonamide allergy (Sulfa cause swelling.) since 30-Sep-2015, Allergy to antibiotic (Ciprofloxacin cause red rash.) since 09-Mar-2021, Allergy to antibiotic (Clindamycin from CLEOCIN HCL) since 30-Sep-2015, Grass allergy since 30-Sep-2015, Dust allergy since 30-Sep-2015, Diverticulosis, Hypothyroidism, GERD, Nephrosis (Nephrosis Right kidney), Congenital abnormalities of GU system (Right kidney Congenital deformity), Head injury (with concussion X 3), Migraine, Vertigo, Migraine (Optical migraine), Sinusitis, Arthritis, Shoulder pain (Bilateral), Heart murmur, Neuropathy, Hypertension, Skin cancer (Pre skin cancer on arms.), Allergy to antibiotic (Clindamycin (from Cleocin HCL)) since 30-Sep-2015, Allergy to antibiotic (Nitrofurantoin (from Macrobid)) since 30-Sep-2015 and Allergy to antibiotic (Ofloxacin f(rom Floxacin)) since 30-Sep-2015. Concomitant products included FLUTICASONE PROPIONATE (FLONASE ALLERGY RELIEF) for Allergy, ASCORBIC ACID, CALCIUM, MINERALS NOS, RETINOL, TOCOPHERYL ACETATE, VITAMIN B NOS, VITAMINS NOS, ZINC (CENTRUM SILVER [ASCORBIC ACID;CALCIUM;MINERALS NOS;RETINOL;TOCOPHERYL ACETATE;VITAMIN B NOS;VITAMINS NOS;ZINC]), RALOXIFENE HCL, LEVOTHYROXINE, CHOLECALCIFEROL, IPRATROPIUM BROMIDE, SALBUTAMOL SULFATE (COMBIVENT RESPIMAT), CHONDROITIN SULFATE, GLUCOSAMINE (GLUCOSAMINE CHONDROITIN [CHONDROITIN SULFATE;GLUCOSAMINE]), OMEGA-3 FATTY ACIDS, VITAMIN C [ASCORBIC ACID], RANITIDINE HYDROCHLORIDE (ZANTAC), ACETYLSALICYLIC ACID (ASPIRIN (E.C.)), CALCIUM CARBONATE, CALCIUM CITRATE, MAGNESIUM CITRATE (CALCIUM MAGNESIUM CITRATE) and LACTOBACILLUS [LACTOBACILLUS NOS] for an unknown indication.    On 24-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 24-Feb-2021, the patient experienced VACCINATION SITE PAIN (Pain at the injection site). On 05-Mar-2021,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced PAIN IN EXTREMITY (Pain all over upper arm/ Left arm pain) and ERYTHEMA (Redness). On 06-Mar-2021, the patient experienced VACCINATION SITE WARMTH (Hot to touch at injection site), FEELING ABNORMAL (Brain frog), VACCINATION SITE SWELLING (Arm still swollen) and HEADACHE (Headache). On an unknown date, the patient experienced VACCINATION SITE ERYTHEMA (Bright red at injection site /redness) and ARTHRALGIA (Joint pain in the left arm). The patient was treated with LORATADINE (CLARITINE) ongoing from 10-Mar-2021 at a dose of UNK UNK, qd and DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]) (topical) for Itching, at a dose of UNK UNK, as necessary. On 26-Feb-2021, VACCINATION SITE PAIN (Pain at the injection site) had resolved. At the time of the report, VACCINATION SITE WARMTH (Hot to touch at injection site), PAIN IN EXTREMITY (Pain all over upper arm/ Left arm pain), ERYTHEMA (Redness), FEELING ABNORMAL (Brain frog), VACCINATION SITE ERYTHEMA (Bright red at injection site /redness), ARTHRALGIA (Joint pain in the left arm) and HEADACHE (Headache) outcome was unknown and VACCINATION SITE SWELLING (Arm still swollen) had not resolved.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) was unknown.   For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   Most recent FOLLOW-UP information incorporated above includes: On 18-Mar-2021: Follow up received on 18 Mar 2021 and updated patient medical history, concomitant medications and treatment  medicines. On 15-Jul-2021: Significant follow-up include patient details including race, medical / surgery/ allergy history, concomitant and treatment medication, and one newevent has been updated.