cannot talk properly; his body and mind are responding slow; It affected him and he didn't know a car was coming and didn't even see them; Not able to make good decision/made the wrong decision; weak when he walks and knees are bending; left side very slow and weak, unable to use left side; weak; could not stand up or be on his feet/ left side weak an unable to stand or walk; cannot type on the keyboard; fell on the floor; numbness on his left hand/numbness and tingling in hand; tingling in hand/numbness and tingling in hand; This is a spontaneous report from a contactable consumer (Patient, self-reported) via medical information team. A 45-year-old male patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot Number: ER729; Expiration Date: 31Jul2021), dose 2 via an unspecified route of administration, administered in Hand Left (shoulder) on 10Apr2021 12:00, as 2ND DOSE, 0.3 ML SINGLE; for covid-19 immunisation. The patient medical history and concomitant medications were not reported. Historical vaccine includes dose 1 (Batch/Lot Number: EP75334, Expiration Date: 31Jul2021), via an unspecified route of administration, administered in Hand Left (shoulder) on 20Mar2021 02:30PM, as 1ST DOSE, SINGLE. It was reported that patient received the second dose of the Pfizer Covid-19 vaccine on 10Apr2021 and he started experiencing numbness on his left hand and next morning he could no feel anything on the left side of his body, it was so weak that he could no lift his hand, walk on stand on his feet. He went to the ER, they made some tests, but primary care doctor did not provide a diagnosis. He started feeling better but today he could not stand up or be on his feet, he cannot talk properly, cannot type on a keyboard and the left side of his body is very slow and weak. Reportedly, the primary care provider was not able to provide him with any diagnosis. He was feeling better, but today, he noticed that he was not able to stand up on his feet again. He cannot talk properly due to weakness. He cannot type on the keyboard. The left side is very slow and very weak. It has been several weeks and he is not feeling better. Stated that he is 46 and was 46 when he experienced these events. Last week, patient went to the neurologist and no one had helped him. The only thing was about the side effects and were not telling him how that can be fixed. Numbness in hand has been more than 2 weeks. He doesn't feel numbness now but is very weak. The left side of his body has less strength. The numbness was minutes after the shot and the tingling was immediately after. The numbness and tingling lasted 30 to 40 minutes after the shot. The emergency doctor gave him some medicine but he does not remember what medicine. They also gave him fluids and then he got some strength. Woke up the next day and was unable to stand. He tried to go to the restroom and was so weak, he fell on the floor. They did all the tests and could not find anything. He is still not feeling normal. His right hand is fine. The left side, where they did the shot had less strength. He can't even move his finger properly and can't type on the keyboard, from the left hand side. if there are any cases like this and how that person got better and what was the root cause. So many weeks, this has been affecting his day to day life. He can not work. He is a software programmer. He needs to use his hands. He can't use his hands. Is feeling like his body and mind are responding slow. When he drives, he is not able to make good decisions. One time he really made the wrong decision. It affected him and he didn't know a car was coming and didn't even see them. States that he spoke to medical information, they could not provide any medical advice. Everyone is making this hard. They could not find another person with similar symptoms. Patient did not receive other vaccine in four weeks of vaccination. On an unspecified date, the patient experienced cannot talk properly, on 10Apr2021 12:05, numbness on his left hand/numbness and tingling in hand, 12:01 tingling in hand/numbness and tingling in hand, on 11Apr2021 weak, could not stand up or be on his feet/ left side weak an unable to stand or walk (was reported as worsened), fell on the floor, cannot type on the keyboard, weak when he walks and knees are bending, left side very slow and weak, unable to use left side, on an unspecified date his body and mind are responding slow, it affected him and he didn't know a car was coming and didn't even see them, not able to make good decision/made the wrong decision. Patient went emergency room on 11Apr2021 they made some tests, but primary care doctor did not provide a diagnosis. Patient was sent home to recover at home. wife was with him and brought him home. They gave him medicines and fluids. He was able to walk and stand up and somehow was recovering well. The patient underwent lab tests and procedures which included blood test: didn't find anything, nothing significant, electrocardiogram: didn't find anything, nothing significant, laboratory test: didn't find anything, nothing significant on an unspecified date. Therapeutic measures were taken as a result of left side very slow and weak, unable to use left side (asthenia). Outcome of the events numbness on his left hand/numbness and tingling in hand and tingling in hand/numbness and tingling in hand was recovered on 10Apr2021 12:45; left side very slow and weak, unable to use left side was not recovered and other events outcome was unknown.   Follow-up attempts are needed. Further information is expected.