Is really sick; Dizziness; Heartburn; throwing up all night; Equilibrium and constantly circling around; two people have to hold her to go to the bathroom in the house. She needs someone there 24/7.; Cannot walk; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP).  A female patient received bnt162b2 (BNT162B2), administration date May2021 (Batch/Lot number: unknown) as dose 2, single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Bnt162b2 (Dose 1, single), administration date: May2021, for COVID-19 Immunization. The following information was reported: ILLNESS (hospitalization) with onset 2021, outcome "unknown", described as "Is really sick"; DIZZINESS (hospitalization) with onset 2021, outcome "not recovered", described as "Dizziness"; DYSPEPSIA (hospitalization) with onset 2021, outcome "unknown", described as "Heartburn"; VOMITING (hospitalization) with onset 2021, outcome "unknown", described as "throwing up all night"; BALANCE DISORDER (hospitalization) with onset 2021, outcome "unknown", described as "Equilibrium and constantly circling around"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (hospitalization) with onset 2021, outcome "unknown", described as "two people have to hold her to go to the bathroom in the house. She needs someone there 24/7."; GAIT DISTURBANCE (hospitalization) with onset 2021, outcome "unknown", described as "Cannot walk". The patient was hospitalized for illness, dizziness, dyspepsia, vomiting, balance disorder, loss of personal independence in daily activities, gait disturbance (hospitalization duration: 7 day(s)). The reporter only remembered that patient was in the hospital for a week. The reporter did not know the event that led the patient to hospitalization. Reporter was not sure exactly when and how. Clinical course: The reporter stated the patient was talking about her equilibrium and she was circling around. Patient cannot walk, she was constantly dizzy. Stated the patient had heartburn more than stomach pain.  It was reported that patient could not leave the house. The patient was really sick. The reporter reported that dizziness was ongoing and it was getting worse. Patient was currently at home and on long term leave. Dizziness: only thing caller heard was it began after patient took the COVID-19 Vaccine. Outcome: thinks this was ongoing and getting worse. The patient was throwing up all night. Reporter did not know dates for this event. Stomach pain: When attempting to query event details regarding stomach pain, reporter stated he was not sure about the stomach pain. Clarified he was not sure if patient experienced this. He stated the patient was circling around, she cannot walk, two people have to hold her to go to the bathroom in the house. She needs someone there 24/7. Clarified this began after patient's second Pfizer COVID-19 Vaccine. Exact dates of COVID-19 Vaccines were unknown; believed both doses were administered in May2021. They could not figure out what's wrong with the patient. Patient was previously not sick at all. Reporter did not know if patient had a third dose of COVID-19 Vaccine.  The lot number for bnt162b2 was not provided and will be requested during follow up.