Arm felt miserable; Fatigue; Slight fever; Feels like this pain could be costochondritis; Haven't felt well; Shortness of breath; pain has gotten to the point where it has interfered with her work; Cough; Cold; This spontaneous case was reported by a health care professional (subsequently medically confirmed) and describes the occurrence of COSTOCHONDRITIS (Feels like this pain could be costochondritis), VACCINATION COMPLICATION (Haven't felt well), DYSPNOEA (Shortness of breath), IMPAIRED WORK ABILITY (pain has gotten to the point where it has interfered with her work) and COUGH (Cough) in a 37-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 026B21A and 036A21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 12-Mar-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 09-Apr-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 09-Apr-2021, the patient experienced VACCINATION SITE PAIN (Arm felt miserable), FATIGUE (Fatigue) and PYREXIA (Slight fever). In April 2021, the patient experienced COSTOCHONDRITIS (Feels like this pain could be costochondritis), VACCINATION COMPLICATION (Haven't felt well), DYSPNOEA (Shortness of breath), IMPAIRED WORK ABILITY (pain has gotten to the point where it has interfered with her work), COUGH (Cough) and NASOPHARYNGITIS (Cold). In April 2021, VACCINATION SITE PAIN (Arm felt miserable), FATIGUE (Fatigue) and PYREXIA (Slight fever) had resolved. At the time of the report, COSTOCHONDRITIS (Feels like this pain could be costochondritis), VACCINATION COMPLICATION (Haven't felt well), DYSPNOEA (Shortness of breath), IMPAIRED WORK ABILITY (pain has gotten to the point where it has interfered with her work), COUGH (Cough) and NASOPHARYNGITIS (Cold) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In April 2021, Blood test: normal (normal) bloodwork normal. In April 2021, Electrocardiogram: normal (normal) Normal.     For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.   After the vaccine, the patient reported having the regular side effects of the vaccine that lasted for a week. When that week ended, "since a week and a half ago, she hadn't felt well. She went to Urgent Care after experiencing chest pain and "she was having a heart attack". A subsequent EKG (electrocardiogram) and bloodwork were both found to be normal. The doctor told her that she was well and prescribed ibuprofen, which she has continued taking since her visit to urgent care.  She had a consultation with her primary care physician scheduled for 24-Apr-2021.   Concomitant product use included some medications prior to vaccination, but the patient was unable to recall the names at the time of the call due to being in pain.  The patient received both scheduled doses of mRNA-1273 prior to the event(s); therefore, action taken with the drug in response to the event(s) is not applicable.  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.; 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.