Myocarditis; First was flu symptoms; fever; chills; body aches; dizziness; shortness of breath; extreme fatigue; Chest pain; Elevated troponin level; Abnormal ekg; Fast heart rate; This is a spontaneous report received from contactable reporter(s) (Consumer or other non healthcare professional). The reporter is the patient.  A 33 year-old male patient received bnt162b2 (BNT162B2), administered in arm left, administration date 26Jan2022 18:30 (Lot number: Fj8757) at the age of 33 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Covid" (unspecified if ongoing). Concomitant medication(s) included: ADVAIR inhaler 230; AMLODIPINE 20 mg; NEXIUM [ESOMEPRAZOLE MAGNESIUM] 5 mg. Vaccination history included: Bnt162b2 (DOSE 2, lot number: Er8733, Prev dose vaccine location=Left leg), administration date: 26Apr2021, when the patient was 33 years old, for COVID-19 immunization, reaction(s): "prev dose vaccine location=Left leg"; Bnt162b2 (DOSE 1, lot number: Ew0151, Arm left), administration date: 05Apr2021, when the patient was 33 years old, for COVID-19 immunization. Prior to vaccination, the patient was diagnosed with COVID-19. Since the vaccination, the patient had been tested for COVID-19 with unknown results. There was no other vaccine within 4 weeks. The following information was reported: MYOCARDITIS (hospitalization, life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "Myocarditis"; INFLUENZA (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "First was flu symptoms"; PYREXIA (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "fever"; CHILLS (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "chills"; PAIN (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "body aches"; DIZZINESS (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "dizziness"; DYSPNOEA (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "shortness of breath"; FATIGUE (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "extreme fatigue"; CHEST PAIN (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "Chest pain"; TROPONIN INCREASED (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "Elevated troponin level"; ELECTROCARDIOGRAM ABNORMAL (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "Abnormal ekg"; HEART RATE INCREASED (life threatening) with onset 27Jan2022 08:00, outcome "not recovered", described as "Fast heart rate". The patient was hospitalized for myocarditis (hospitalization duration: 2 day(s)). The events "myocarditis", "first was flu symptoms", "fever", "chills", "body aches", "dizziness", "shortness of breath", "extreme fatigue", "chest pain", "elevated troponin level", "abnormal ekg" and "fast heart rate" were evaluated at the physician office visit. The patient underwent the following laboratory tests and procedures: electrocardiogram: (27Jan2022) abnormal; heart rate: (27Jan2022) fast; sars-cov-2 test: (29Jan2022) unknown; troponin: (27Jan2022) elevated. Therapeutic measures were taken as a result of myocarditis, influenza, pyrexia, chills, pain, dizziness, dyspnoea, fatigue, chest pain, troponin increased, electrocardiogram abnormal, heart rate increased.