I thought I was going to die; Sick; over a 103 temperature/the fever was so high; I had such bad chills; nausea; I would throw it up; arm was so bad, it had it's own pulse, a pulse of it's own, I couldn't lift it at all plus the pain was like a tooth ache pain; checks your oxygen level and normally its 98-99, it went down to 91/her oxygen level was down to 90; my chest was shortness of breath; This is a spontaneous report from a contactable consumer (patient) via a Pfizer Sponsored program. A 70-year-old female patient received the second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 MRNA VACCINE; solution for injection) via an unspecified route of administration on 24Feb2021 (at the age of 70-years-old) as a single dose in the left arm for COVID-19 immunization. Medical history included viruses, flus (I have had viruses, flus my whole life), five surgeries, gallbladder removed, and asthma, all from unspecified dates and unspecified if ongoing. Concomitant medications were not reported. The patient previously received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 MRNA VACCINE; solution for injection) on an unspecified date, at the age of 70-years-old and experienced a very sore arm. On an unspecified date in Feb2021 the patient experienced, "I thought I was going to die", "sick", "over a 103 temperature/the fever was so high", "I had such bad chills", "nausea", "I would throw it up", "arm was so bad, it had its own pulse, a pulse of its own, I could not lift it at all plus the pain was like a tooth ache pain", "checks your oxygen level and normally its 98-99, it went down to 91/her oxygen level was down to 90" and "my chest was shortness of breath". The clinical course was reported as follows: "I wanted to call today because I got the Pfizer COVID Vaccine 3 weeks ago, 03Feb2021 it was. After the first dose I had a very sore arm and that was it. It was more sore than normal vaccine, but it was that was all I had. After the second dose I was not aware that I would get sick to the extreme that I did. I found out afterwards that other people have said this, I did not know at the time. I thought I was going to die. I am a 70-year-old woman, I am not young, and I have had viruses, flus my whole life and I got so sick. First, I had over a 103 temperature, it came on suddenly, 12 hours to the minute after I got the vaccine. On top of that I had such bad chills I never saw anything like that in my life, 5 blankets on top of me, sweaters, sweatshirts and the fever was so high. I could not keep the Tylenol down because I had nausea and I would throw it up. So, I could not even get rid of it. Then on top of that my arm was so bad, it had its own pulse, a pulse of its own, I could not lift it at all, plus the pain was like a tooth ache pain, it was excruciating. I have had 5 surgeries, my arm hurt worse than all 5 surgeries put together. And I had my gall bladder removed and everything, nothing hurt to this extent. Now also I have asthma, nothing severe but I do have asthma, so I have one of those little oximeters and you put it on your finger and it checks your oxygen level and normally its 98-99, it went down to 91, all night it was 91, my chest was shortness of breath. I was ready to go to the hospital. And I did not know it was going to be that bad." When clarified about the treatment the patient stated that "yes, the Tylenol helped once I could hold it down. The doctor gave me something to stop the vomiting and the nausea. And then I could take the Tylenol and then the Tylenol worked great. But at first, I was so sick I could not hold the Tylenol down in my stomach I would throw it up, that was the problem." When asked about lab work the patient stated that she had not had lab work done since the first vaccine. She stated that she had stayed in the house because she had other health issues and was afraid to come out for 11 months. So she had not gone out to get anything done. The patient stated that she called because if a third dose was needed, she suggested that a smaller dose be given to small people. She stated that she took childrens medicine most of the time because she was tiny. She wanted to know if Pfizer in the future would be making doses for small people and doses for bigger people. Her suggestion was to have a separate booster to go by weight or by gender, men usually did not experience the same. The clinical outcomes of the events "I thought I was going to die", "sick", "over a 103 temperature/the fever was so high", "I had such bad chills", "nausea", "I would throw it up", "arm was so bad, it had its own pulse, a pulse of its own, I could not lift it at all plus the pain was like a tooth ache pain", "checks your oxygen level and normally its 98-99, it went down to 91/her oxygen level was down to 90" and "my chest was shortness of breath" were all recovered/resolved on unspecified dates.   The lot number for the vaccine, BNT162B2, was not provided and will be requested during follow up.