His legs were numb and wouldn't react; His legs were numb and wouldn't react; It killed all the nerve fibers on his legs; Lost the sensation in his legs/cannot feel his legs anymore; He couldn't walk; Swollen; frightening; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 65-year-old male patient received BNT162b2 (BNT162B2), on 26Feb2021 as dose 2, single (Lot number: EN6198) at the age of 65 years, in left arm for covid-19 immunisation. The patient's relevant medical history included: "LADA late stage, type 1 Diabetes" (unspecified if ongoing), notes: LADA late stage, type 1 Diabetes; "Heart valve replacement", start date: 2019 (unspecified if ongoing); "Blood pressure" (unspecified if ongoing); "Cholesterol" (unspecified if ongoing); "To keep the blood thin" (unspecified if ongoing), notes: to keep the blood thin. Concomitant medication(s) included: QUINAPRIL taken for blood pressure measurement; PRAVASTATIN taken for blood cholesterol; VITAMIN D3; BABY ASPIRIN taken for anticoagulant therapy; VITAMIN B-COMPLEX [VITAMIN B COMPLEX]. Vaccination history included: BNT162b2 (Dose: 01, Lot: EL9269, Route, Anatomical Location: left arm), administration date: 05Feb2021, when the patient was 65-year-old, for Covid-19 immunization. The following information was reported: GAIT DISTURBANCE (non-serious) with onset Mar2021, outcome "unknown", described as "He couldn't walk"; LOSS OF CONTROL OF LEGS (medically significant), HYPOAESTHESIA (non-serious) all with onset Mar2021, outcome "unknown" and all described as "His legs were numb and wouldn't react"; NERVE INJURY (non-serious) with onset Mar2021, outcome "unknown", described as "It killed all the nerve fibers on his legs"; SENSORY LOSS (non-serious) with onset Mar2021, outcome "unknown", described as "Lost the sensation in his legs/cannot feel his legs anymore"; SWELLING (non-serious) with onset Mar2021, outcome "recovered", described as "Swollen"; FEAR (non-serious) with onset Mar2021, outcome "unknown", described as "frightening". The events "his legs were numb and wouldn't react" and "he couldn't walk" required physician office visit. The patient underwent the following laboratory tests and procedures: Antibody test: (2021) 200, notes: He states his antibodies dropped to almost nothing, to 200 or whatever; Magnetic resonance imaging: (unspecified date) Unknown results, notes: He has had numerous MRIs and has been to cardiologists, rheumatologists and neurologists; Skin test: (unspecified date) small nerve fibers in his legs are gone, notes: small nerve fibers in his legs are gone.  Clinical information: Consumer stated, "Two weeks after he received the second dose so it would have been of Mar2021 or 15Mar2021, he do not have the exact date."He also stated adverse reactions "Well, it had been a long year. March may be 15Mar2021, he got out of bed and could not walk, his legs did not want to work. Both the limbs were very numb and did not respond and so he had to hold onto the furniture to get out of walking so, he did not totally lose my ability to walk but it was close. he did not have the dates and all the doctors in front of me but he had been on them with over the last 12 months. It was at least more than a dozen visits to MRI, MRI with dye, cardiologists you know doppler or whatever they use. he mean he had been put to the ringer and the only diagnosis it was from a neurologist. He did skin patch biopsy on my legs and the swollen part was gone.." Expiration date: Consumer stated," I don't know the expiration date. I don't have access for that. Laboratory test: Consumer stated, "Yeah antibody test, yes I got three and that's a curious conversation well. Prior getting the booster in October, I went for the antibody check. Roughly 6 months after the second vaccine, I went for my antibodies check and they were very low. They were like 300 an arbitary number it's obviously more, it's better. I was on airplane, I was travelling. I was in the middle of lots of Doctors, back surgeons, Rheumatologist, Cardiologist. I wanted to see my grandkids well, I better take the booster even though I was not sure of it. The smart thing to do at that point was I had three or four antibodies check. The first was close to 300, I don't know the exact number. After the booster, it was 2500 and then three months later, I just had a check probably a month ago and it dropped down back to like 400 so, the booster lasted may be 90 days. I do not, I got a history of antibody test or it was good. I guess it was for 6 months. I don't really any had a check for first 6 months but it dropped down automatically after 6 months. I got booster it was 2500. I get check began in January till February it got dropped back to 400 so, it dropped dramatically." (test results were not clarified appropriately hence, not captured). Further assistance: Consumer stated, "No actually the numbers on Antibody test were done in March. So I have done in December so two months after I got the booster, it's 2500 and then in 14Mar2022 this year, the number dropped to 245 so, it's pretty much more low. I just expect now that I just not needed it any more or I need the m RNA."