like a mini stroke; trouble walking and keeping her balance; trouble walking and keeping her balance/balance is not good; went into the doctor for a flu shot and the nurse made a mistake and gave her this booster shot; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A female patient received BNT162b2 (BNT162B2), on 10Jan2022 as dose number unknown (booster), single (Batch/Lot number: unknown) for covid-19 immunisation. The patient didn't receive influenza vaccine (FLU). The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Covid-19 vaccine (Primary Immunization series complete but unknown manufacturer), for COVID-19 immunization. The following information was reported: WRONG PRODUCT ADMINISTERED (non-serious) with onset 10Jan2022, outcome "unknown", described as "went into the doctor for a flu shot and the nurse made a mistake and gave her this booster shot"; TRANSIENT ISCHAEMIC ATTACK (medically significant), outcome "not recovered", described as "like a mini stroke"; GAIT DISTURBANCE (non-serious), outcome "not recovered", described as "trouble walking and keeping her balance"; BALANCE DISORDER (non-serious), outcome "not recovered", described as "trouble walking and keeping her balance/balance is not good". The event "like a mini stroke" required emergency room visit.  Clinical course included: Reporter stated she was just beside herself because she can't get help from anywhere and wanted to call Pfizer's office; stated she was calling about the Pfizer COVID Booster shot and needed help because she does not think her doctor's office cares to help much and just thought there was something she could take from the drugstore that may help. Reporter clarified she was getting this booster shot and did not ask for it and she went into the doctor for a flu shot and the nurse made a mistake and gave her this booster shot and a couple of days later she had the side effects which were bad, and it was like a mini stroke and her husband rushed her to the emergency room. Stated her question was for the side effects and what can she do as she does have trouble walking even now and her balance was not good and her shot was on 10Jan2022, and here it was Jul2022, and she was still having side effects; stated her husband had to carry her purse and she had to hold him to walk and wanted to find out what happened and the nurses are gone and her doctor was reading in the office. Reporter declined to complete report and stated she wanted this to be short as she was suffering from this and feels like she was holding onto a straw to try to get her body better and just wants to get better. Reporter also shared that one of her neighbours who got the Pfizer COVID-19 vaccine was still in the hospital and that she considered herself lucky. Reporter was looking for information on how to treat her side effects. Survey was not offered as reporter immediately dropped the call after saying her thanks. Reporter asks if the medical information agent will help her with something to take to get better. Reporter declined mailing address and email address.  The information on the batch/lot number for BNT162b2 has been requested and will be submitted if and when received.