horrible chest pain; he got pericarditis; fatigue; This spontaneous case was reported by a patient and describes the occurrence of CHEST PAIN (horrible chest pain) and PERICARDITIS (he got pericarditis) in a 79-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 006BZ1A and 014M20A) for COVID-19 vaccination. The occurrence of additional non-serious events is detailed below.     No Medical History information was reported.   On 23-Feb-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) 1 dosage form. On 23-Mar-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In September 2021, the patient experienced CHEST PAIN (horrible chest pain) (seriousness criterion hospitalization), PERICARDITIS (he got pericarditis) (seriousness criteria hospitalization and medically significant) and FATIGUE (fatigue). The patient was hospitalized from 01-Oct-2021 to 02-Oct-2021 due to PERICARDITIS. The patient was treated with IBUPROFEN for Adverse event, at an unspecified dose and frequency and COLCHICINE for Inflammation, at a dose of Pills. At the time of the report, CHEST PAIN (horrible chest pain), PERICARDITIS (he got pericarditis) and FATIGUE (fatigue) had not resolved.      DIAGNOSTIC RESULTS (normal ranges are provided in parenthesis if available): In September 2021, Electrocardiogram: abnormal (abnormal) left side of cardiogram looked weird.         No concomitant medications were reported. The patient had horrible chest pain and thought that he had COVID. He was still having the symptoms a bit, that's why he was going to see the doctor. On 01-Oct-2021, EKG was reported, no results provided. He had never experienced symptoms like this before receiving the Moderna COVID-19 vaccine.  Company Comment: This spontaneous case concerns a 79-year-old male patient with no relevant medical history who experienced serious unexpected event of chest pain and serious expected event of pericarditis. The events occurred approximately 6 months after the second dose of the Moderna COVID-19 Vaccine. Initially, the patient experienced horrible chest pain and though to have COVID. The patient had ECG performed which was abnormal so he went to the hospital. The patient was hospitalized for one day due to pericarditis. At the time of the report, none of the events resolved as it was reported by the patient that he still had them a bit,  Rechallenge was not applicable as the events occurred after the second dose so no rechallenge was done and recurrence was not applicable.  Patient's advanced age is a possible confounder. The benefit-risk relationship of product is not affected by this report   This case was linked to MOD-2021-369480 (Patient Link).; Sender's Comments: This spontaneous case concerns a 79-year-old male patient with no relevant medical history who experienced serious unexpected event of chest pain and serious expected event of pericarditis. The events occurred approximately 6 months after the second dose of the Moderna COVID-19 Vaccine. Initially, the patient experienced horrible chest pain and though to have COVID. The patient had ECG performed which was abnormal so he went to the hospital. The patient was hospitalized for one day due to pericarditis. At the time of the report, none of the events resolved as it was reported by the patient that he still had them a bit,  Rechallenge was not applicable as the events occurred after the second dose so no rechallenge was done and recurrence was not applicable.  Patient's advanced age is a possible confounder. The benefit-risk relationship of product is not affected by this report