high fever; Paralyzed; Her nervous system and muscle system shut down, nothing worked; Her nervous system and muscle system shut down, nothing worked; Her heartrate and everything went up; left arm had also swelled up into a big ball; almost died; not feeling good; This is a spontaneous report from a Pfizer sponsored Program from a contactable consumer (patient reported for herself). A 60 years old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 3 via an unspecified route of administration, administered in Arm Left on 18Aug2021 12:00 (at the age of 60 years old) (Batch/Lot number was not reported) as single dose for covid-19 immunisation. Medical history included Multiple sclerosis (MS) ongoing, they said she had a rare condition called Uhthoff's phenomenon syndrome and that had not happened to anyone since the 1920's, but it happened to her. The patient's concomitant medications were not reported. No any other vaccinations within four weeks prior to the first administration date of the suspect vaccine(s). No AE(s) following prior vaccinations. Vaccination Facility Type was Pharmacy/Drug Store. Vaccine Administered at Military Facility was No. No History of all previous immunization with the Pfizer vaccine considered as suspect (or patient age at first and subsequent immunizations if dates of birth or immunizations are not available). The patient previously received the first and second doses of BNT162B2 in Jan2021 for COVID-19 Immunization and no adverse event. The patient experienced high fever (hospitalization) on 19Aug2021, paralyzed (hospitalization, Medically Significant) on 19Aug2021, almost died (Medically Significant) on 19Aug2021, her nervous system and muscle system shut down, nothing worked on an unspecified date, her heartrate and everything went up on an unspecified date, left arm had also swelled up into a big ball on an unspecified date, not feeling good on 18Aug2021 13:00. The patient was hospitalized for high fever and paralyzed from 19Aug2021 to 21Aug2021. Caller had question about the Covid vaccine booster shot, thought it was approved already. She ended up in the hospital for 4 days for a high fever and was paralyzed, she almost died. Has MS and nobody told her she shouldn't be getting the Covid vaccine. Caller confirmed the above details and clarified she had had MS (multiple sclerosis) prior to any Covid vaccine. Said they just tell to get the vaccine and there was no disclaimer about it. She was in the hospital and was told by the doctors she needed to get the vaccine booster, but she almost died. There was nothing on there to say anything about this. Pfizer should be putting a disclaimer on this. Said she did not know what was in it, but the vaccine was not safe. She wanted something to be put on it because it's dangerous and whoever was put in charge of it should get to put disclaimers on it and they didn't get all their boxes checked with this booster shot. Requested to speak to someone about this to keep from getting someone killed. Received the Covid booster on Wednesday, 18Aug2021. An hour afterwards (13: 00) she was not feeling good and so she drank some water and laid down and went to sleep for 7 hours. When she woke up the next morning on the 19th she was paralyzed and she couldn't move and so she had to call #to come and get her. She couldn't move and had to roll out of bed onto the ground and she did not know how she did it, but somehow she got to her cellphone and was able to call someone. She also had a very high fever. The paramedics came and put her on a gurney and took her to the hospital. She ended up asking to get discharged from the hospital later on Saturday night, the 21st. She now had people coming out to her home to teach her to walk again. Again mentioned she was asked by the hospital and the doctor still told her to get the booster and that she would get better. Mentioned her left arm had also swelled up into a big ball, but that was better. No other vaccines given the same day as the booster vaccine and none 4 weeks prior. No other problems with vaccines in past other than this booster Covid shot. Stated the hospital sent her a box full of paperwork and they added every sign of disease test they could do. They said she had a rare condition called Uhthoff's phenomenon syndrome and that has not happened to anyone since the 1920's, but it happened to her. Again, mentioned she had a very high fever and her whole body went boiling until her body shut down. Her nervous system and muscle system shut down, nothing worked. Her heartrate and everything went up and she was just a body and couldn't do anything. They did MRI scans, brain scans, spinal tap and every possible test in the world to find out what happened to her. Finally they thought it was because they couldn't find out what it was, mentioned that this only happened to people with MS. Said her doctor would be calling so paperwork sent to her would not help. Whoever put this vaccine together it was dangerous and it was not going to get or be fine and Pfizer should be responsible. It's just not good and it's pushed to people to get it and it's dangerous and someone should know. The time of onset of events high fever and paralyzed was morning. The events high fever and paralyzed required a visit to Emergency Room and Physician Office. The outcome of events high fever, Paralyzed and almost died was recovering; of the other events was unknown.  The lot number for BNT162B2 was not provided and will be requested during follow-up.