positive COVID-19 test with symptoms; positive COVID-19 test with symptoms, tested for COVID (PCR); night sweats; Soreness at injection site; slight temp 99.5 degrees/her temperature was 101 degrees Fahrenheit/it was 102.5 degrees Fahrenheit/99 degrees Fahrenheit and then 98 degrees Fahrenheit; Tiredness she related to giving blood; This is a spontaneous report from a contactable nurse (patient). A 54-year-old female patient received the first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, lot number: EL0140) via intramuscular on 19Dec2020 15:45 on left deltoid at a single dose for prevention as frontline health worker at hospital (COVID-19 immunisation). The patient donated blood on 18th and no antibodies were present then. The patient was a former smoker and quit 2 or 3 years ago. Patient diagnosed Osteoporosis in 2015, benign heart arrhythmia in 2005. The patient took 70 mg alendronate sodium (FOSAMAX) once weekly and just a regular OTC daily multivitamin. Caller reported she was having the covid vaccine on 19Dec2020 and began having fever, night sweats, loss of taste and smell and then tested positive for covid. The patient received the Pfizer COVID 19 vaccine through work on 19Dec2020. She received it at 3:45 pm and should have taken temperature before, but she was afebrile the day before because she donated blood. At 7pm, she had slight temp 99.5 degrees Fahrenheit and by 10:30, her temperature was 101 degrees Fahrenheit and she still felt fine. She was surprised that it was that. She woke up at 2:30 am on 20Dec2020 and took her temperature and it was 102.5 degrees Fahrenheit. She took 2 Tylenol and went back to bed and felt fine. By morning it was 99 degrees Fahrenheit and then 98 degrees Fahrenheit a little later. She has been afebrile since then. She was a little tired because she gave blood and though it was related. She does not know if it was a side effect or not. It was not significant tiredness and was just not having energy in the evening of 19Dec2020. She also had soreness at injection site that night after 22:00 and the next day. It did not bother her until she woke up in the middle of night, and she noticed her left arm was sore. She received the vaccine at 3:45pm and started with low grade fever at 6:30 pm, earlier stated at 7:00 pm. There was no prescriber. She tested for COVID (PCR) on Saturday, 26Dec2020 at 14:50and it came back positive 28Dec2020 18:45. At 10pm on 19Dec2020, her temperature was 101 degrees Fahrenheit. If she had not been monitoring her temperature, she would not have known. She has been Afebrile since morning of 20Dec2020. Tiredness she related to giving blood and the holidays. She was a little stressed about the holidays and running around. It was very mild. Soreness at injection site was during the night after 10pm when she went to bed. On Wednesday, 23Dec2020, she woke up congested, sniffly, sneezy, with a runny nose. This persisted through Wednesday night. Her sense of taste was off. She had no problem with that on Tuesday. She had some horrible smell at work she recalled, so she knew her sense of smell was fine. On Thursday, 24Dec2020, she had no sense of taste or smell. She could not smell a pine candle. She was congested on Thursday and called employee health on 24Dec2020. This both improved and persisted. She is still congested but it has improved. She has never had a complete loss of sense of taste or smell before. Mild cough started yesterday morning. On the night of 20Dec2020, and 21Dec2020, she developed night sweats. She had not had any night sweats before this since menopause and she woke up really wet. The patient was not hospitalized and not admitted to an Intensive Care Unit. NO ER or physician's office required. She did not know if she was exposed on the day of the vaccine or if a couple of days later if the fever is from the vaccine. She stated what are the chances she goes 10 months and is super careful and then gets the vaccine and test positive. The patient did not display clinical signs at rest indicative of sever systemic illness. The patient did not require supplemental oxygen nor receive mechanical ventilation. No Multiorgan failure. The patient did not receive any additional therapies for COVID- 19. No initiation of new medication or other treatment or procedure. Not any preexisting diseases worsen during the SARS-CoV2 infection. She would like to know if there is a chance of false positive for this. It would just be her luck to be 10 months and not getting it. She has not gone anywhere without her N95 and then gets the vaccine and gets COVD. She wears mask and face shield at work always. She also wanted to know if she should get the second dose. The outcome of the event slight temperature was recovered on 20Dec2020 and the other event was recovering.; Sender's Comments: Based on the information currently available, a lack of efficacy with the suspected vaccine BNT162B2 in this patient cannot be completely excluded.