dehydrated and then he stayed in the hospital for some time; said patient has Covid; severe reaction to the vaccine/severe allergic reaction to the vaccine; high fever/get real hot/running a 103.1; sweating; UTI; could not breathe and he was struggling to breathe; Moaning; diarrhea; chills; shaking all over; severe headache; started throwing up; he was not feeling well; This is a spontaneous report from a contactable consumer (patient's wife). A 77-year-old male patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; lot number: EN6202 and expiry date: unknown), via an unspecified route of administration on 26Feb2021 16:00 at a single dose for covid-19 immunization. Medical history included asthma and stage 4 kidney disease. The patient's concomitant medications were not reported. On 27Feb2021 (Saturday), patient was not feeling well and on 28Feb2021, he had diarrhea, chills, shaking all over, severe headache and started throwing up. Reporter stated patient had all the symptoms of the reactions and then "you go again to the serious, more dangerous symptoms, he has all of them". Throwing up, fever, chills, diarrhea and then he get real hot and then he started sweating and it was another day on 01Mar2021. On Monday (01Mar2021), reporter called to take patient to the hospital with high fever. The ambulance put him on IV and oxygen right away. They gave him fluids and were monitoring everything because he was dehydrated and then he stayed in the hospital for some time. He had x-rays, they monitored his blood pressure and heart rate, and the doctor was concerned about his heart rate and blood pressure. Doctor decided to check his urine and he did and he had a UTI on 01Mar2021, and so he gave him antibiotics for that (treatment unspecified). Patient seemed to be better after having the fluids and everything so they let him come home. During the night on 01Mar2021, he had another attack and it was the same thing that he had before. The shaking and the chills the fever and throwing up and the doctor said that it was a reaction from having the vaccination and reporter just wanted to report that he did and reported actually thought he was going to die. Reporter tried to call again the ambulance since she thought that he was not going to make it. The doctor put on the report and he did not put on there that he was in there because of suspected of (incomplete sentence) and then told the reporter himself that he had a reaction from the vaccine. The report stated that patient was in for a UT, but the reporter stated that, once does not call an ambulance for a UTI and she (reporter), have UTI's all the time. After the reporter got the patient home, he was even much worse. Patient could not breathe and he was struggling to breathe on 01Mar2021. He was shivering, shaking, having diarrhea, throwing up, soaking wet, and she had to change his clothes twice, and his fever was 103.1 F around 2:00 or 3:00 in the morning of 02Mar2021. The pharmacist gave medicine for vomiting. Reporter called the hospital and the nurses were busy and they could not take it so 24 hour nurse called. She was finally able to get him comfortable enough that she didn't have to call again. She thought she was going lose him. She said she felt twice he was going to die, when she called. At the hospital they told him he was having a severe reaction to the vaccine but also had a UTI and they gave him antibiotics. Patient contacted her nephew who is a medic in the military and RN and he said patient has Covid and thinks reporter has Covid too because the virus was in the vaccine. The nephew explained that patient just could not fight it off and said the vaccine acts like that. It made sense because it is inhibit in it then your body will learn to fight it off, like if you come in contact with it and that makes sense but the woman never explained. The nephew further stated to reported that patient's immune system or whatever was not able to fight it off. So, he said he has to have Covid and when patient heard that after all they had fought to stay away from it and then what were they supposed to do. Patient got the vaccine and ended up with it and that is what reporter have found out and it was very disturbing. Patient was running a 103.1 earlier on the night of 02Mar2021. He was moaning a little bit on Mar2021. Reporter thought patient had severe allergic reaction to the vaccine because he had all the symptoms and stated there was no doubt in her mind (referring to it being an allergic reaction) as it was too soon after the vaccine. Outcome of the event of dehydration was recovering, while for the remaining events was unknown. Reporter was asking if patient should take the second shot.