she tried to "force" stretch the area and it was getting better but not really; She reported that she is still struggling to lift and did not go to work on Saturday, 27Mar2021; arm was still hurting, throbbing and bothering; had discomfort, pain, throbbing and worked through the pain.; movement was difficult due to inflammation; Sore shoulder; injection was in the shoulder and not in the arm; Sore arm; Arm was tight; Shoulder was tight and inflamed; Throbbing; Was not able to do much; Could not lift anything; mobility in the arm and shoulder was gone.; This spontaneous case was reported by a consumer (subsequently medically confirmed) and describes the occurrence of INCORRECT ROUTE OF PRODUCT ADMINISTRATION (injection was in the shoulder and not in the arm), PAIN IN EXTREMITY (Sore arm), MUSCULOSKELETAL STIFFNESS (Arm was tight), SWELLING (Shoulder was tight and inflamed) and PAIN (Throbbing) in a 30-year-old female 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 24-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 24-Mar-2021, the patient experienced INCORRECT ROUTE OF PRODUCT ADMINISTRATION (injection was in the shoulder and not in the arm), PAIN IN EXTREMITY (Sore arm), MUSCULOSKELETAL STIFFNESS (Arm was tight), SWELLING (Shoulder was tight and inflamed), PAIN (Throbbing), ASTHENIA (Was not able to do much), LIMB DISCOMFORT (Could not lift anything), MOBILITY DECREASED (mobility in the arm and shoulder was gone.) and ARTHRALGIA (Sore shoulder). On 25-Mar-2021, the patient experienced PAIN IN EXTREMITY (arm was still hurting, throbbing and bothering), DISCOMFORT (had discomfort, pain, throbbing and worked through the pain.) and HYPOKINESIA (movement was difficult due to inflammation). On 26-Mar-2021, the patient experienced FEELING OF RELAXATION (she tried to "force" stretch the area and it was getting better but not really) and FATIGUE (She reported that she is still struggling to lift and did not go to work on Saturday, 27Mar2021). The patient was treated with TRAMADOL at an unspecified dose and frequency; PARACETAMOL (TYLENOL) on 26-Mar-2021 at an unspecified dose and frequency and IBUPROFEN at an unspecified dose and frequency. On 24-Mar-2021, INCORRECT ROUTE OF PRODUCT ADMINISTRATION (injection was in the shoulder and not in the arm) had resolved. At the time of the report, PAIN IN EXTREMITY (Sore arm), MUSCULOSKELETAL STIFFNESS (Arm was tight), SWELLING (Shoulder was tight and inflamed), PAIN (Throbbing), ASTHENIA (Was not able to do much), LIMB DISCOMFORT (Could not lift anything), MOBILITY DECREASED (mobility in the arm and shoulder was gone.), PAIN IN EXTREMITY (arm was still hurting, throbbing and bothering), DISCOMFORT (had discomfort, pain, throbbing and worked through the pain.), HYPOKINESIA (movement was difficult due to inflammation), FEELING OF RELAXATION (she tried to "force" stretch the area and it was getting better but not really), ARTHRALGIA (Sore shoulder) and FATIGUE (She reported that she is still struggling to lift and did not go to work on Saturday, 27Mar2021) outcome was unknown.        The action taken with mRNA-1273 (Moderna COVID-19 Vaccine) (Unknown) was unknown.       No concomitant medications were reported.