Patient thinks he has Crohn's disease but has not been diagnosed; 36 hours post vaccination he had sternal pain; Bedridden for 48 hours; This spontaneous case was reported by a pharmacist and describes the occurrence of CHEST PAIN (36 hours post vaccination he had sternal pain), BEDRIDDEN (Bedridden for 48 hours) and CROHN'S DISEASE (Patient thinks he has Crohn's disease but has not been diagnosed) in a 23-year-old male patient who received mRNA-1273 (Moderna COVID-19 Vaccine) (batch nos. 054C21A and 004C21A) for COVID-19 vaccination. No Medical History information was reported.On 05-May-2021, the patient received first dose of mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular) 1 dosage form.On 08-Jun-2021, received second dose of mRNA-1273 (Moderna COVID-19 Vaccine) (unknown route) dosage was changed to 1 dosage form. In June 2021,  after starting mRNA-1273 (Moderna COVID-19 Vaccine), the patient experienced CHEST PAIN (36 hours post vaccination he had sternal pain). On an unknown date, the patient experienced BEDRIDDEN (Bedridden for 48 hours) and CROHN'S DISEASE (Patient thinks he has Crohn's disease but has not been diagnosed). In June 2021, CHEST PAIN (36 hours post vaccination he had sternal pain) had resolved. At the time of the report, BEDRIDDEN (Bedridden for 48 hours) had resolved and CROHN'S DISEASE (Patient thinks he has Crohn's disease but has not been diagnosed) outcome was unknown. For mRNA-1273 (Moderna COVID-19 Vaccine) (Intramuscular), the reporter did not provide any causality assessments.No concomitant medications were reported.No treatment information was provided.The patient had sternal pain 36 hours post vaccination, then fully self resolved. He was bedridden for 48 hours. No known diagnosis of myocarditis or pericarditis as per pharmacist. HCP states that the patient thinks he has Crohn's disease but has not been diagnosed due to cost of medical care.Patient was vaccinated with flu vaccine post the second dose of the Moderna vaccine.Company Comment: This spontaneous case concerns a 23-year-old, male patient with no medical history reported, who experienced the unexpected, non-serious events of chest pain, bedridden and Crohn's disease. The event chest pain occurred 36 hours after administration of the second dose of the Moderna mRNA-1273 vaccine. The start date of the event bedridden was not provided. The report stated that the event chest pain had resolved. However, the patient was bedridden for 48 hours. The outcome was unknown at the time of the report. The rechallenge was not applicable as no additional dosing will be given. The benefit-risk relationship of the Moderna mRNA-1273 vaccine is not affected by this report. Further information has been requested.This case was linked to MOD-2021-406672 (Patient Link). Sender's Comments: This spontaneous case concerns a 23-year-old, male patient with no medical history reported, who experienced the unexpected, non-serious events of chest pain, bedridden and Crohn's disease. The event chest pain occurred 36 hours after administration of the second dose of the Moderna mRNA-1273 vaccine. The start date of the event bedridden was not provided. The report stated that the event chest pain had resolved. However, the patient was bedridden for 48 hours. The outcome was unknown at the time of the report. The rechallenge was not applicable as no additional dosing will be given. The benefit-risk relationship of the Moderna mRNA-1273 vaccine is not affected by this report. Further information has been requested.