upset stomach; temperature of 100; chills; aches and pains; as if she has the flu; tired; pain in her arm; This is a spontaneous report from a contactable consumer. A 70-year-old female patient received second dose of patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; Solution for injection; Lot number: unknown; expiration date: unknown) via an unspecified route of administration in right arm on 27Feb2021 at 14:00 (at the age of 70-year-old) as single dose for COVID-19 immunization. Relevant medical history of the patient included Diverticulitis (started in 2011 and was ongoing- She takes no medication for this condition, she was fine, she just does not eat things with seeds or anything like that in it. Genetic-mother had diverticulitis and sister has diverticulitis), Bowel resection (in 2011), heartburn, respiratory arrest. Family history included-patient's mother had uterine cancer and diverticulitis-she believes mother died as a result of the uterine cancer even after she told she was cancer free. Patient's father had colon cancer, but he was cancer free for years after that and died of natural causes. Sister has diverticulitis. Concomitant medication included Famotidine taken for heartburn [taken for years] started on an unspecified date and was ongoing, Magnesium Unknown [taken for years] started on an unspecified date and was ongoing, lorazepam (ATIVAN) started on an unspecified date and was ongoing [taken for years]. She did not take Ativan before vaccine on 27Feb2021 because she wanted to be as clear as she could be]. Patient previously took Penicillin and experienced allergy [Onset at age 13 years, she has had penicillin derivative medications since then without problem because doctor said that you can outgrow penicillin allergy with age], took sulfa drug on an unspecified date and experienced allergy [She never takes sulfa drugs because she always tells the doctors who never prescribe anything with sulfa], patient took clindamycin in 2012 [Onset maybe 9 years ago] and experienced allergy, took Creon (stomach medicine) in 2016 [onset 5 years ago] and experienced allergy, received iodine compounds used in contrast dye in 1978 and experienced allergy [Onset was 43 years ago when she had respiratory arrest. She has not used any iodine compounds used in contrast dye since then. Iodine compounds used in contrast dye], previously received pneumonia vaccine, or pneumococcal vaccine on an unspecified date about three years ago and experienced tiredness for about two days. Patient previously received first dose of patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE; Solution for injection; Lot number: unknown; expiration date: unknown) via an unspecified route of administration in left arm on 06Feb2021 at 14:00 as single dose for COVID-19 immunization. On 28Feb2021 at 06:00, after receiving second dose of vaccination, patient experienced fever, Chills, aches, pains, flu-like symptoms. Her temperature was usually around 97.2 degrees Fahrenheit; but on 28Feb2021 her temperature was 100 degrees Fahrenheit, later in the day she got tired and took Motrin and the temperature went down but it went up last night. She had a little temperature of 99.9 this morning and had no aches and pains this morning (report date: 01Mar2021) but was still pretty tired and has a bit of an upset stomach. She had a little pain in her arm yesterday (28Feb2021) but had no tenderness and it was not red. She stated she was feeling better. She took today off of work due to events, and thinks she needs to take tomorrow off. She was taking Motrin for the events and the symptoms would go away but she has not taken Motrin since last night around 23:00 because she did not want to mask the symptoms. She had no allergic reaction to the Pfizer COVID-19 Vaccine because she sat there for the first 15 minutes after the vaccine was administered and felt fine. She felt fine the night of 27Feb2021; she cooked a big dinner for a dinner party they had for her cousin's birthday and stayed up watching a movie and was fine until waking around 06:00 on 28Feb2021. She has no pain, no redness or swelling or anything in the arm where she got the injection. She could tell if it was anything more because her fever temperature would be more. She felt best when she was in the bed. She gets the chills and gets very tired when she gets up out of bed moving around. Patient was due to have a saliva COVID test tomorrow for work. Outcome of the events were resolving.  No follow-up attempts are possible; information about lot/batch number cannot be obtained.