heart attack; inflammation around my heart with fluid/chest pain; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 76-year-old female patient received bnt162b2 omi xbb.1.5 (COMIRNATY (2023-2024 FORMULA)), on 14Oct2023 at 10:45 as dose 1, single (Batch/Lot number: unknown) at the age of 76 years, in left arm for covid-19 immunisation; for covid-19 immunisation. The patient's relevant medical history included: "Diabetic" (ongoing), notes: Diabetic. Concomitant medication(s) included: TOUJEO taken for diabetes mellitus; JANUVIA taken for diabetes mellitus. Vaccination history included: bnt162b2 (DOSE 1, Single, LOT # ER8735), administration date: 07Apr2021, when the patient was 74-year-old, for COVID-19 immunization; bnt162b2 (DOSE 2, Single , LOT # ER8735), administration date: 05May2021, when the patient was 74-year-old, for COVID-19 immunization; bnt162b2 (DOSE 3 (BOOSTER), Single,  LOT# FF2593), administration date: 10Nov2021, when the patient was 74-year-old, for COVID-19 immunization; bnt162b2 (DOSE 4 (BOOSTER), Single, LOT# FM9992.), administration date: 08Jul2022, when the patient was 75-year-old, for COVID-19 immunization. The following information was reported: MYOCARDIAL INFARCTION (hospitalization, medically significant) with onset 15Oct2023, outcome "unknown", described as "heart attack"; MYOCARDITIS (hospitalization) with onset 15Oct2023, outcome "unknown", described as "inflammation around my heart with fluid/chest pain". The patient was hospitalized for myocardial infarction, myocarditis (start date: 14Oct2023, discharge date: 17Oct2023, hospitalization duration: 4 day(s)). The patient underwent the following laboratory tests and procedures: Blood test: Unknown results, notes: I found the milligram that the thing you needed, it was 0.3 milligram in muscle as directed. Therapeutic measures were taken as a result of myocarditis.  Clinical information: On Saturday the 14th, She had the COVID shot and on the 15th She ended up on the hospital, they thought she was having a heart attack but it happened to the inflammation around my heart with fluid and she feel that she should be compensate for being ended up in the hospital, she thought she was going to die. The patient stated that they said as a result of this shot, it brought on the chest pain. When probed for the treatment of inflammation around heart Consumer stated, she had a 'nitro-patch' and then she was on colchicine 0.6milligrams tablet. Discharge date was stated as 17Oct2023. When probed for the previous immunization with Pfizer: Consumer stated, she had a total of 5, this was 5th one and the other four one was alright but the fifth one sent me to the hospital. She had all of them with Pfizer. 1st one was done 07Apr2021, LOT # ER8735 and they she had the other one 05May2021, EW0167, and then the other one was 10Nov2021, LOT# FF2593 and then the other one was done 08Jul2022, LOT# FM9992. They all of from Pfizer. Everything was fine but this shot, the last one that she had (withheld), lead to the hospital." The information on the batch/lot number for bnt162b2 omi xbb.1.5, bnt162b2 omi xbb.1.5  has been requested and will be submitted if and when received.