high fever (over 102, 103.7, 102.7, 99 or 100); Blurred vision; shaking like crazy; has no energy; it was double vision, like looking in a fun house mirror; he is still freezing; does not feel like himself; Had been feeling tired and rundown; Headache; horrible chills; night sweats; This is a spontaneous report from a contactable consumer (sister). A 63-year-old male patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 1 via an unspecified route of administration on 17Mar2021 (Batch/Lot number was not reported) as single dose for covid-19 immunisation. Patient medical history: no. Family medical history: no. The patient's concomitant medications were not reported. Vaccination facility type: hospital. Vaccine administered at military facility: no. The patient experienced high fever (over 102, 103.7, 102.7, 99 or 100) on 04Apr2021, blurred vision on 04Apr2021, headache on 2021, horrible chills on 2021, night sweats on 2021, shaking like crazy on Apr2021, has no energy on Apr2021, had been feeling tired and rundown on 2021, it was double vision, like looking in a fun house mirror on Apr2021, he was still freezing on Apr2021, did not feel like himself on Apr2021. On Saturday, her brother was out shopping with her and stated that he felt very tired and run down and had a headache. He started running a high fever but stuck it out at home. On 04Apr2021, he was taken to the emergency room and admitted to the hospital. They had been running test after test and can't seem to find anything wrong. The doctor thought that it was some kind of reaction to the vaccine. The patient was still running a high fever over 102 and was still experiencing fatigue and headaches on and off, and horrible chills and night sweats. The patient wanted to wait until the day after Easter to go to the hospital but started experiencing new symptoms. He was starting to experience blurred vision. Was then taken to the emergency room. The fever went down with Tylenol but continued to go up again when Tylenol wears off. Temperature was 103.7 at one point and has mostly been over 102, stating that this morning was 102.7. It had been one week that he was still having these symptoms. It was strange because the patient was feeling all right for the first 2 weeks. At the hospital, they kept giving him Tylenol to bring the fever down. He had been shaking like crazy. Had horrible chills and night sweats. He had no energy. He had not had the second dose. They cannot find anything else wrong. He was a health nut and run five miles a day. Took good care of himself. He seemed ok the first 2 weeks. Had been a week that he still can't break the fever. When looked up the symptoms, he had everything except for nausea. He also had blurred vision. They did a spinal tap, echocardiogram, EKG and blood work. He had seen 5 different doctors. The fever was highest at 103.7 and has consistently been over 102. With Tylenol, it had gone down to 99 or 100 but always shoots back up. 2 weeks after the shot, he took his temperature and wasn't feeling good all day. He stayed home from Wednesday until Sunday when he started experiencing new crazy vision symptoms. Stated that started Saturday. He was taken to the hospital on Easter and was admitted to the hospital, and was still there. The vision problem was new and it started to develop Saturday night. It was double vision, like looking in a fun house mirror. He still experienced the double and blurry vision now but only occasionally, when he tried to get up. It was on and off when he had to get up to go to the bathroom. He was still freezing and had shake and chills. He got night sweats and fever, chills, and did not feel like himself. The reporter didn't think he had high cholesterol or high blood pressure, diabetes, or anything like that. Tests: They did bloodwork, CT scans, MRI of the brain, echocardiogram, EKG, spinal tap.  There were no white blood cells found in the spinal tap and that the echocardiogram was good. Everything came back normal. He had seen cardiologists, neurologists, gastroenterologists, primary care doctors, and no one can find anything. They did another kind of test regarding his vision. Her brother was depressed and wanted his energy back. It had been a whole week. The outcome of the events high fever (over 102, 103.7, 102.7, 99 or 100) and blurred vision was not recovered, outcome of the remaining events was unknown. The patient was hospitalized for high fever (over 102, 103.7, 102.7, 99 or 100) and blurred vision from 04Apr2021 to an unknown date. The reporter was not sure if this was happening because of the vaccine.   Follow-up attempts are completed. No further information is expected. Information about lot/batch number cannot be obtained.