Kidney's are not functioning the best; This spontaneous case was reported by a consumer and describes the occurrence of RENAL IMPAIRMENT (Kidney's are not functioning the best) in a 77-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 001A21A and 04320A) for COVID-19 vaccination.     No Medical History information was reported.   On 03-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 03-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In March 2021, the patient experienced RENAL IMPAIRMENT (Kidney's are not functioning the best) (seriousness criterion medically significant). At the time of the report, RENAL IMPAIRMENT (Kidney's are not functioning the best) had not resolved.            It was reported that side effects occurred about a week and a half after second dose.  No concomitant medications were reported.  It was reported that patient had pain in the tendons and muscles, skin turned yellow, Kidneys would hurt, effecting his brain, Legs are still sore, Bothered stomach/Effected stomach, Pain near pancreas and gall bladder. Patient felt like aged like crazy, looks like aged 5 years.  Patient reported doctor treated for arthritis and ran test but patient said don't had arthritis. Stomach seemed to be in better shape. Doctor had patient taking stuff for ulcers but it only helped a little.  Patient reported that side effects have been occurring for the past 15 months. Doctor's don't know what to do about it.  Treatment information included vitamins. Company comment: This is a spontaneous case concerning a 77-year-old male patient with no medical history reported, who experienced the unexpected serious (medically significant) event of adverse event of special interest Renal impairment, described as kidneys are not functioning well, which occurred approximately a week and a half after receiving the second dose of mRNA-1273 vaccine. Patient had received 2-dose primary series of mRNA-1273 vaccine given at an interval of 28 days which falls within the recommended vaccine dosing schedule. Initially, patient was in good health and can walk for about a mile each day, however after given with second dose of vaccine, patient noted pain in the tendons and muscle. Patient consulted a medical doctor and was treated for arthritis. After several examinations, arthritis was excluded. Patient also experienced leg pain, abdominal discomfort, pain near pancreas and gall bladder area, and pain in the kidneys. He was given medications indicated for ulcer and vitamins, however these offered a little relief of symptoms. It was also reported that the patient's kidneys are not functioning well which affecting his brain. No further details about the diagnostic procedures were provided. Patient reported that the events were not resolved. The elderly age of the patient could be a risk factor for the event Renal impairment. The benefit-risk relationship of mRNA-1273 is not affected by this report.   Reporter did not allow further contact; Sender's Comments: This is a spontaneous case concerning a 77-year-old male patient with no medical history reported, who experienced the unexpected serious (medically significant) event of adverse event of special interest Renal impairment, described as kidneys are not functioning well, which occurred approximately a week and a half after receiving the second dose of mRNA-1273 vaccine. Patient had received 2-dose primary series of mRNA-1273 vaccine given at an interval of 28 days which falls within the recommended vaccine dosing schedule. Initially, patient was in good health and can walk for about a mile each day, however after given with second dose of vaccine, patient noted pain in the tendons and muscle. Patient consulted a medical doctor and was treated for arthritis. After several examinations, arthritis was excluded. Patient also experienced leg pain, abdominal discomfort, pain near pancreas and gall bladder area, and pain in the kidneys. He was given medications indicated for ulcer and vitamins, however these offered a little relief of symptoms. It was also reported that the patient's kidneys are not functioning well which affecting his brain. No further details about the diagnostic procedures were provided. Patient reported that the events were not resolved. The elderly age of the patient could be a risk factor for the event Renal impairment. The benefit-risk relationship of mRNA-1273 is not affected by this report.