tested positive later in the day; tested positive later in the day; exposed to someone with covid virus; headaches in the back of head and ears; heaviness, it seems like pressure; Fever/101.6; This is a spontaneous report from a contactable healthcare professional (patient). A 53-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, solution for injection, lot number: EK9231), via an unspecified route of administration, administered to the left deltoid, on 14Jan2021 between 2:30-2:45pm (14:30-14:45) at single dose for COVID-19 immunisation. It was offered at her worksite. The patient's medical history included ongoing Baker's cyst right knee. The patient had no family history. Concomitant medication included celecoxib (CELEBREX) from May2020 for Baker's cyst. The patient had no additional vaccines administered on the same date of the BNT162B2. The patient previously took flu shot and she got sick (in the 1980's or 1990's). The patient had no prior vaccinations that were within 4 weeks prior to the first administration date of BNT162B2. The patient, a Senior facility HCP, took a covid test on Monday and was negative. Yesterday (14Jan2021), she received the first dose and then tested positive later in the day. She wanted to know if she can get the next dose at the appropriate time or if she has to wait 90 days. On 14Jan2021, the patient experienced headaches in the back of head and ears, heaviness, it seems like pressure, fever, and exposed to someone with covid virus. It was reported that the patient was debating on getting the Pfizer BioNTech Covid vaccine and so she finally decided to get it yesterday (14Jan2021). Two hours after getting it and getting home, her head started to hurt and fever, which she thought that was typical. That night the fever broke and it started again this morning (15Jan2021). She works at a senior facility and had to ask for an extended medical leave. She was tested yesterday for Covid that morning and had the vaccine in the afternoon. She was exposed to someone with the virus. She knows there are 2 shots and now she has had the one. She wanted to know if it's safe to get the second one since someone said she may need to wait 90 days since being exposed. She still has the headaches in the back of head and ears, heaviness, it seems like pressure. The fever has been under 100, it's been about 99 and the highest it got was yesterday at 101.6 degrees. By the time she went to bed last night it got down to 98.2 degrees. She has alternated Advil and Tylenol. She took temperature at 6am today (15Jan2021) and it was 99.8 and so she took a couple of Advil to help and by 7am it was down to 99.2. So, it's staying in the 99.2-99.3 range. The patient did not receive any other vaccines the same day or 4 weeks prior. The patient mentioned when getting the her very first flu shot, which she was hesitant about getting, she did get sick, but it wasn't immediately after. Since then she has been fine. She thinks this was in the 1980's or 1990's. She mentioned that this is a new vaccine and there is not a lot of information out there. She wanted to know if she will get immunity right away. She mentioned she was tested on Monday for Covid and told if she didn't get a call she was fine and she didn't hear anything. Then was told yesterday she was exposed to someone with Covid and so she had testing again yesterday. She is awaiting results (pending clarification). No further details provided. She was diagnosed around Memorial Day last year for right knee baker's cyst and given celecoxib. She went through physical therapy and has full range of motion, but cyst still there and tender. She may see a rheumatologist. She just finished her 30 days of celecoxib and didn't see any difference. It was reported that the events did not require a visit to emergency room nor physician office. The outcome of the event " tested positive later in the day" was unknown while the outcome of the events headaches in the back of head and ears, heaviness, it seems like pressure, fever, and exposed to someone with covid virus was not recovered.; Sender's Comments: The reported tested positive on the same day that the patient received first dose of COVID 19 vaccine, BNT162B2, is considered unlikely related to the suspect. Of note, the patient exposed to someone with the virus.