This is a spontaneous report from a contactable consumer (father) or other non health care professional.   A 46-years-old male patient received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, Formulation: Solution for injection, Batch/Lot Number: ER8727), via an unspecified route of administration administered in arm left on 24Mar2021 as 1st dose, single dose for COVID-19 immunization. Medical history included Parkinsons diagnosed 12 years ago and dystonia diagnosed 8 years ago from an unknown date and unknown if ongoing states the patient has had four deep brain stimulations and was in neurological care and takes a lot of medications. The patient's concomitant medications were not reported. Patient did not receive any vaccination 4 weeks prior to receiving Covid 19 vaccine. On 24Mar2021, the patient had the Pfizer Vaccine and a day and a half later could not feel his legs and has not been able to walk since; states the vaccine was the only different thing he had and everything else was routine and going on for years and his dystonia did not just jump and he can't say the reason this happened but it should be looked at. He can't say the Pfizer Vaccine was the reason for the reported events and he can't say it isn't the reason. On 26Mar2021, the caller stated that in the morning but could have been the night before as the patient was in bed and said he could not feel his legs and couldn't walk; states he could not stand up to this day on an unknown date and was in a wheelchair and everything was done in a wheelchair. Caller stated the patient had nothing new and no kinds of other medication or vaccines done other than what was prescribed by his doctor. Stated he was healthy other than what the disease has done to him. Stated for treatment everything was exactly the way it has always been and they adjust his deep brain stimulations once in a while and basically try to help out the dystonia and the Parkinsons seems to be taken care of but the dystonia was really the culprit. Stated that the patient had the Pfizer Vaccine and a day and a half later could not feel his legs and had not been able to walk since, the patient went to the health care professional and was going back again next week and the health care professional tried to adjust the batteries and increased his medication to see if that would help and the increased medication did nothing and nothing changed. The medication that did nothing was Carvidopa or Levodopa or whatever it was called and he went from taking 2 pills twice per day to taking three pills twice per day after the incident with the Pfizer Vaccine trying to help out and nothing changed. Caller states for some reason the Pfizer Vaccine just went in and did something to some part of his brain and must have gone after the weakest point and he was only guessing this as no doctor has answers and they don't know. The patient had been Carvidopa Levodopa for 12 years. Patient was afraid to take 2nd dose which was scheduled on 14Apr2021, and the patient did not take that. The event he could not stand up to this day and was in a wheelchair and everything was done in a wheelchair was assessed as serious (disability).The adverse events resulted in physician office visit. The vaccination facility type was reported as hospital. The outcome of the events was reported as unknown.