near syncope; Sinus Tachycardia; Hypothyroidism; tested positive for Covid 19; tested positive for Covid 19; lost weight; No sense of taste or smell; No sense of taste or smell; losing hair; heart rate started increasing; high blood pressure; Increased cough; Sleepy; tired; Headache; This is a spontaneous report from a contactable other healthcare professional (patient) through the Medical Information Team and Pfizer-sponsored program Pfizer First Connect. A 44-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; lot number: EL0140), intramuscularly on the arm on 19Dec2020 11:15 at a single dose for COVID-19 immunization. Medical history included tachycardia and stroke from 2019 and diabetes mellitus diagnosed in summer of 2020 and ongoing. Family medical history included father had type 2 diabetes. Concomitant medication included metformin hydrochloride, sitagliptin (JANUMET) for diabetes. The patient previously took regular flu shot and had body aches; it did not happen at the year of report but in years past she did have it. The patient took the COVID vaccine for precaution as she was a healthcare worker/paramedic and stated there was no prescriber. She received the vaccination at a health department facility, not a military facility. She had no previous immunizations and no additional vaccines were administered on the same date as COVID-19 vaccine. The patient received her first dose of COVID-19 vaccine on 19Dec2020 and after nine days, she tested positive for COVID-19 on 30Dec2020 and had an inpatient hospital stay. She mentioned she was so happy that she did not have any symptoms for those days. She stated that she got the shot on the 19th and later that evening was when she started having symptoms. She tried to sleep and it woke her up, she felt sleepy, tired and experienced headache on 19Dec2020 20:00 to 21:00. On 28Dec2020 23:00, she had an increased cough. She initially had increased cough from wearing mask and was having post nasal drip, then she got wet cough and that was when she decided to get tested. She went back and forth on dates; stated she was confused with the dates because of being in the hospital, it had been a while and the dates were all meshing in together. Her specimen was collected and they did the test on 29Dec2020 then found out that she tested positive for COVID virus with a COVID test nasal swab on 30Dec2020 17:30. She mentioned she lost weight after she got COVID, had no sense of taste or smell on unspecified dates. She did not know if it was related to her thyroid but she started losing hair and her heart rate started increasing on Monday, so they took her off all her meds and said the COVID was doing crazy things to the body. She had to go on Carvedilol for the sinus tachycardia and had high blood pressure now. This was all new after she tested positive. She has had bouts of tachycardia before and did have a heart monitor as she had a stroke last year. So those have never been persistent or symptomatic. If she did have a high heart rate, it always went down. This one was symptomatic. She did fine the whole week after the shot, just had that little bit of sleepiness, was tired, and had a headache. The patient reported near syncope with sinus tachycardia due to COVID-19 and hypothyroidism on 08Jan2021 14:30 to 15:00, which required hospitalization from 08Jan2021 to 10Jan2021 (2 days). ER or physician's office was required. She never went to the ER for the vaccination, it was just for the near syncope with sinus tachycardia due to COVID-19 and hypothyroidism that she went and was then admitted to hospital. She just got out of the hospital the day before report (10Jan2021), was there for two days and was still recovering. She was supposed to receive her second vaccination on the day of report however her doctor did not know if she should get the second dose due to double antibodies. She did not ask if she still had the virus or it went away. She has not been to work in two weeks. Outcome of the events tested positive for COVID virus was not recovered; near syncope with sinus tachycardia due to COVID-19 and hypothyroidism was recovered with sequel; sleepy, tired and headache was recovering; while the remaining events was unknown.; Sender's Comments: A possible contributory effect of suspect BNT162B2 on reported events cannot be excluded.  The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to regulatory authorities, Ethics Committees, and Investigators, as appropriate.