passed out in the school/blacking out; could not hear; felt hot; Breathing got faster; voices muffled; Vision was blurry; she fell on the floor; her blood pressure was low in 90 tees, 96/61/low all the time or sometimes BP was so low that machine was giving errors; if she tries to get up, she would feel dizzy and can't stand; could not stand; Dizzy; This is a spontaneous report received from contactable reporter (Consumer or other non HCP).  A 14-year-old female patient (not pregnant) received bnt162b2 (PFIZER COVID-19 VACCINE), administered in arm left, administration date 11Aug2021 (Lot number: FC3181) at the age of 14 years as dose 2, single for covid-19 immunisation. The patient's relevant medical history was not reported. Prior to vaccination, the patient was not diagnosed with COVID-19. Since the vaccination, the patient had not been tested for COVID-19. The patient did not receive other vaccine in four weeks or other medications in two weeks of vaccination. Vaccination history included: Bnt162b2 (Dose Number: 1, Lot Number: FA6780, Location of injection: Arm Left), administration date: 21Jul2021, when the patient was 14 years old, for COVID-19 immunization. The following information was reported: LOSS OF CONSCIOUSNESS (medically significant, life threatening), described as "passed out in the school/blacking out"; DEAFNESS (medically significant, life threatening), described as "could not hear"; FEELING HOT (life threatening), described as "felt hot"; RESPIRATORY RATE INCREASED (life threatening); DYSPHONIA (life threatening), described as "voices muffled"; VISION BLURRED (life threatening), described as "Vision was blurry"; FALL (life threatening), described as "she fell on the floor"; HYPOTENSION (life threatening), described as "her blood pressure was low in 90 tees, 96/61/low all the time or sometimes BP was so low that machine was giving errors"; DIZZINESS POSTURAL (life threatening), described as "if she tries to get up, she would feel dizzy and can't stand"; DYSSTASIA (life threatening), described as "could not stand"; DIZZINESS (life threatening), described as "Dizzy"; all with onset 13Aug2021, outcome "not recovered". The all events were evaluated at the doctor or other healthcare professional office/clinic visit and emergency room/department or urgent care. The patient underwent the following laboratory tests and procedures: blood pressure: (13Aug2021) 96/61, notes: low in 90 tees, 96/61, it was low all the time or sometimes bp was so low that machine was giving errors; blood test: (13Aug2021) unknown results; (30Nov2021) unknown results, notes: again; breathing: (13Aug2021) got faster. It was unknown if therapeutic measures were taken as a result of all events. Clinical course: Couple days after receiving her second dose in Aug2021, she passed out in the school, felt hot, breathing got faster, started blacking out, could not hear, voices muffled, vision was blurry and kept passing out-coming back, she fell on the floor, her blood pressure (BP) was low in 90 tees, 96/61. School nurse was checking BP every few minutes, it was low all the time or sometimes BP was so low that machine was giving errors. She could not stand, if she tried to get up, she would feel dizzy and could not stand. They went to school and took her to the ER. Doctors at the ER checked her, did tests. They said it could be the side effects of vaccine. Same week in Aug2021, they went to her regular pediatric doctor. Her pediatric also said this could be the side effects of vaccine. On 30Nov2021 (last Tuesday), she was again having same symptoms like feeling black outs, dizzy, low BP, could not stand. They took her to pediatrician again, did blood test again.