her back was fractured; passed out; fell on the floor, and hit her back on the bed; she started to not feel well; chills; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient. Other Case identifier(s): LRN4871510.  A 73-year-old female patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 15Nov2022 as dose number unknown (booster), single (Batch/Lot number: unknown) at the age of 73 years for covid-19 immunisation. The patient's relevant medical history included: "Aneurysm in heart" (unspecified if ongoing), notes: Aneurysm in heart; "Pneumonia" (unspecified if ongoing); "Clogged artery" (unspecified if ongoing), notes: Clogged artery; "Smoker" (unspecified if ongoing); "Rheumatoid arthritis" (ongoing), notes: Rheumatoid arthritis with rheumatoid factor of multiple sites without organ or systems involvement; "Thyroid issues" (ongoing), notes: Thyroid issues; "Cholesterol issues" (ongoing), notes: Cholesterol issues; "Trouble breathing" (ongoing), notes: Trouble breathing; "Cough" (ongoing). Concomitant medication(s) included: FLU [INFLUENZA VACCINE] taken for immunisation, on 15Nov2022 as dose number unknown, single; AMLODIPINE; CLOPIDOGREL; ADVAIR HFA; LEVOTHYROXINE; ATORVASTATIN; RITUXAN. Vaccination history included: Covid-19 vaccine (Primary Immunization series complete; unknown manufacturer), for Covid-19 immunization. The following information was reported: CHILLS (non-serious) with onset 15Nov2022, outcome "recovered" (15Nov2022); FALL (hospitalization) with onset 15Nov2022, outcome "recovered", described as "fell on the floor, and hit her back on the bed"; SPINAL FRACTURE (hospitalization) with onset 15Nov2022, outcome "recovered", described as "her back was fractured"; LOSS OF CONSCIOUSNESS (hospitalization, medically significant) with onset 15Nov2022, outcome "recovered", described as "passed out"; MALAISE (non-serious) with onset 15Nov2022, outcome "recovered", described as "she started to not feel well". The patient underwent the following laboratory tests and procedures: investigation: her back rechecked; X-ray: back was fractured. Clinical course: The patient reported that on 15Nov2022 received a Pfizer Covid booster along with flu shot and later that day started to not feel well, further clarified as had chills and went to bed. The patient reported that the chills went away that same night, clarified as 15Nov2022, but got up out of bed that night, passed out, fell on the floor, and falling hit back on the bed. Husband called the ambulance to help the patient get up off the floor and the patient was taken to the hospital. During her hospital stay, the patient stated that had a x-ray and it showed that back was fractured. The patient stated that stayed in the hospital for a couple of days and back rechecked a couple weeks after the hospital discharge, and was awaiting to hear back from the back and spine specialist to found out about her back. The patient stated that did not know if  fractured back is resolved or not, but seemed to be doing ok.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.