headache; she doesn't remember cutting the potatoes/ his wife didn't remember getting the booster; dizziness; Booster; brain didn't feel fine/wife experienced this only a bit / weird /still dealing with head feeling strange; concentration 75% of normal; having to think harder about basic things; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team for a sponsored program.  A 63 year-old female patient received bnt162b2 (BNT162B2, Formulation: Solution for injection), administration date 02Dec2021 (Batch/Lot number: F00809 or FO0809) at the age of 63 years as dose 3 (booster), single for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: Bnt162b2 (first dose , LOT: EN6200), administration date: 10Mar2021, when the patient was 62 years old, for COVID-19 Immunization, reaction(s): "little dizziness" (after her first vaccine dose she had a little dizziness that was not bad, she was fine); Bnt162b2 (second dose, LOT: EN6206), administration date: 01Apr2021, when the patient was 62 years old, for COVID-19 Immunization, reaction(s): "a little funny in the head for a short period of time", "sore arms", "diminished strength" (After second vaccine she felt a little funny in the head for a short period of time, and random stuff she dont care about like sore arms which doesnt concern reporter, and diminished strength for 10-12 days which didnt concern reporter).   The following information was reported: MENTAL IMPAIRMENT (medically significant) with onset Dec2021, outcome "not recovered", described as "having to think harder about basic things"; IMMUNISATION (non-serious) with onset 02Dec2021, outcome "unknown", described as "Booster"; FEELING ABNORMAL (non-serious) with onset 02Dec2021, outcome "not recovered", described as "brain didn't feel fine/wife experienced this only a bit / weird /still dealing with head feeling strange"; HEADACHE (non-serious) with onset 03Dec2021, outcome "unknown", described as "headache"; MEMORY IMPAIRMENT (non-serious) with onset 03Dec2021, outcome "recovered" (03Dec2021), described as "she doesn't remember cutting the potatoes/ his wife didn't remember getting the booster"; DISTURBANCE IN ATTENTION (non-serious) with onset Dec2021, outcome "unknown", described as "concentration 75% of normal"; DIZZINESS (non-serious) with onset 03Dec2021, outcome "not recovered", described as "dizziness" (On friday she was presenting with dizziness). Therapeutic measures were not taken as a result of mental impairment, feeling abnormal, headache, memory impairment, disturbance in attention, dizziness. Additional information: patient was pretty fit and works out 4 days a week. patient get on a trail and hike 15 miles and be fine, her was in the upper percentages of health for their age. On Friday patient was cooking potatoes and the subject came up and she asked if she should cut a couple more potatoes, then she said it was weird because she doesnt remember cutting the potatoes, and she asked what day is it, and then she goes am I supposed to be at work? He says he told her no, that they called out for the day from getting the vaccine, and asked if she remembered but his wife didnt remember getting the booster. He says this went on for 15-20 minutes and then he contacted (Withheld) but he couldnt get thru, so he tried to get ahold of Pfizer because he spoke to their pharmacists in the past a couple of times, but he couldnt get thru, then he tried withheld clinic and it was the same deal. He says they have an urgent care there but he couldnt get thru, so he called his son who is a paramedic who said if they go into the ER, there is a 4-6 hour triage period to sit in the ER and you cant get in to see anybody unless it is severe. He says he tried their general practitioner who is off on Fridays and they were able to get ahold of them for a minute and he advised to take her to the ER if she didnt improve. Caller says he felt like he shouldnt be driving, and then in 30-45 minutes she started to remember things, they gradually came back to her over the next 1-2 hours. He says for 35-40 minutes she was in la-la-land. He says at this point they were still dealing with head feeling strange, with concentration 75% of normal, and having to think harder about basic things like folding laundry, which is easy to lose concentration. He says they were both dealing with this kind of stuff. He says the near as he can tell when he delved into research on this, was buried in there there were truck drivers and airplane pilots, though the studies were not broad, who had gotten encephalopathy post vaccine. He says after vaccine dose two they both had a mild case maybe and were a little dizzy, and then the booster with three vaccines in less than a year, he felt like that might be it though he doesnt know all the earmarks. He says there was amnesia, confusion, cognitive dysfunction of swelling in brains, and that is why he called because he wanted to find out if it was ok and does that mean they shouldnt get a booster down the road if they are necessary? He says he was pro-vaccine and is still pro-vaccine, but he is a little concerned, he thinks with good reason. He says he doesnt know how many others experienced this, he is sure it would be a small majority, but it is strange since both his wife and he got the vaccines at the same locations at the same times". Patient has improved a lot considering where she was, she is not having amnesia and the level of confusion she was experiencing. Reporter says he was going to take her to the ER if it kept going but she answered questions with normal responses post initial onset and remembered she did get the vaccine and that she cut a couple of potatoes and that it was a Friday.   The lot number for bnt162b2 was not provided and will be requested during follow up.