This spontaneous case was reported by a consumer and describes the occurrence of PAINFUL RESPIRATION (right lung hurts when breathing) and MUSCULOSKELETAL CHEST PAIN (right rib cage hurts) in a 55-year-old female patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 028A21A and 02BA21A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     Concurrent medical conditions included Chronic obstructive pulmonary disease (severe; needs 24 hour Oxygen) and Degenerative disc disease. Concomitant products included HYDROCODONE BITARTRATE, PARACETAMOL (HYDROCODONE/ACETAMINOPHEN) for Pain, PROPRANOLOL (PROPANOLOL [PROPRANOLOL]), CLONAZEPAM, FLUOXETINE HYDROCHLORIDE (PROZAC), DIPHENHYDRAMINE HYDROCHLORIDE (BENADRYL [DIPHENHYDRAMINE HYDROCHLORIDE]), TOLTERODINE and ROFLUMILAST (DALIRESP) for an unknown indication.   On 10-Apr-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form. On 12-May-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) dosage was changed to 1 dosage form. On 12-May-2021, the patient experienced VACCINATION SITE REACTION (covid arm), INFLUENZA LIKE ILLNESS (flu like symptoms), ABDOMINAL PAIN UPPER (stomach hurts), FEELING ABNORMAL (do not feel right/not herself/ no endurance left and hard to explain how she is feeling), VACCINATION COMPLICATION (dont feel well/good/right / she still not feeling good and herself ever since her 2nd shot) and FATIGUE (tired weak). 12-May-2021, the patient experienced VACCINATION COMPLICATION (took me down hard), ASTHENIA (tired weak) and MALAISE (took me down hard). In May 2021, the patient experienced DEHYDRATION (dehydrated). On 24-May-2021, the patient experienced PAINFUL RESPIRATION (right lung hurts when breathing) (seriousness criterion hospitalization) and MUSCULOSKELETAL CHEST PAIN (right rib cage hurts) (seriousness criterion hospitalization). The patient was treated with POTASSIUM (oral) ongoing since an unknown date for Dehydration, at a dose of 1 dosage form twice a day. In May 2021, VACCINATION COMPLICATION (took me down hard) had resolved. At the time of the report, PAINFUL RESPIRATION (right lung hurts when breathing), MUSCULOSKELETAL CHEST PAIN (right rib cage hurts), VACCINATION SITE REACTION (covid arm), INFLUENZA LIKE ILLNESS (flu like symptoms), ABDOMINAL PAIN UPPER (stomach hurts), DEHYDRATION (dehydrated), FEELING ABNORMAL (do not feel right/not herself/ no endurance left and hard to explain how she is feeling), ASTHENIA (tired weak), MALAISE (took me down hard) and FATIGUE (tired weak) outcome was unknown and VACCINATION COMPLICATION (dont feel well/good/right / she still not feeling good and herself ever since her 2nd shot) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): On an unknown date, Computerised tomogram: normal (normal) lung CT scan was done and the result of lung screen came back normal.         The patient had several blood tests done which revealed no abnormal findings.  Company Comment: Based on the current available information and temporal association between the use of the product and the start date of the event, 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 event, a causal relationship cannot be excluded.