real bad headache; real bad nausea; at night waking her up; All day 25Mar2021 in bed, sleeping and sleeping; chills were severe and the chills lasted 6 hours with that intensity; diarrhea; feels weakness 6 days after the 2nd dose, does not have energy; day 6 and she is still not feeling well; She is smelling like something coming out of her body; lethargic; only site of burning up was her cheeks; hands feel clammy; cheeks were red and swollen, face had a little puffiness; fever,only checked it couple times:started at 100.9 went to about maximum of 101.3; heavy ache; cheeks were flushed; her arm got worse.Arm is lessening,it is softer,not as hard,went from red to splotchy; fatigue, Tiredness; she is still getting hot and cold and hot and cold where her fingertips will be cold and then amazingly, she will be sweating; muscle pain; joint pain; injection site pain swelling; injection site pain swelling; redness; This is a spontaneous report from a contactable consumer (patient). A 73-year-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE Solution for injection; lot number and expiry date not reported), via an unspecified route of administration, on 24Mar2021 14:00 (at the age of 73-year-old), as dose 2, single, for COVID-19 immunisation. Medical history included abdominal tumors which lead to stage iv endometrial cancer; hysterectomy in Mar2020 due to stage iv endometrial cancer. The patient had been on chemo from May2020 to Oct2020. It was reported that her cancer has almost resolved, she was in a very weird group, they call her cells frankenstein cells and does not know how she this hit her because she had a total hysterectomy last Mar2020. She was diagnosed initially with stage 1A and they got everything, she wasn't need anything and within 4 weeks boom, tumors in her abdomen and then stage IVb and she was put on standard CarboTaxol, chemo for about 5 months. Concomitant medications included pembrolizumab (KEYTRUDA, every 3 weeks immunotherapy) taken for stage iv endometrial cancer from Nov2020 and ongoing; other vitamins (VITAMINS NOS); AHCC mushroom extract. Historical vaccine included BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE Solution for injection; lot number and expiry date not reported), via an unspecified route of administration, on an unspecified date, as dose 1, single, for COVID-19 immunisation and experienced arm redness and soreness. On 24Mar2021, 5 to 6 hours after the Pfizer COVID-19 Vaccine the patient experienced diarrhea one time at night. The patient experienced tiredness, chills, headache, muscle pain, joint pain, fever, injection site pain swelling, redness, nausea, feeling unwell. On 25Mar2021, the patient experienced chills during night, like has never had, at night waking her up, about 6 hours of that, heavy ache. Chills which started about 10-12 hours after Vaccine shot. It was reported that, it was severe lasted 6 hours with that intensity, until around 08:00 on 25Mar2021; but then ongoing on and off from then until the time of report. The patient experiences intermittent chills as of now. The patient experienced headache when her chills ended which was about 10 to 12 hours after getting Vaccine; after chills ended around 08:00 on 25Mar2021, that is when she started to get a headache. The headache lasted all day long and night long and that was her worst day, and she took two Tylenol twice just to get through it during that time on 25Mar2021. The severity was just that one day. The patient had an intermittent headache, and it was dull for the next three days and took 1 Tylenol each day. The patient experienced nausea coupling with the headache which lasted all day 25Mar2021 from 08:00 until to 23:00. She was laid out that day and she could hardly stand up to go to bathroom. The patient feels lethargic, zero energy and heavy. On 25Mar2021, morning had real bad headache, real bad nausea for couple of days. She did not vomit but was in bed with garbage can thinking she was going to vomit anytime. All day 25Mar2021 in bed, sleeping and sleeping, that's how bad she feels, this was not normal for her. The patient had fever, only checked it couple times: started at 100.9 went to about maximum of 101.3 and everything was going fine. She took Tylenol. She did not feel like she was burning up, only site of burning up was her cheeks and noticed her cheeks were flushed and face had a little puffiness. It was reported that, when she touches her hands, they feel clammy, her hands were cold and then when she touches her face it was warm like she feels she has a temperature. But in the past when she would do this sometimes find temperature would be below normal like maybe 97.9 even. Cheeks have been red and swollen and her arm got worse. Arm is lessening, it is softer, not as hard, went from red to splotchy. The patient experienced all these events close to 48 hours or day 3. On day 6, the patient was still getting these chills and then was warm, does not have a headache on the positive, but does not have energy and was not feeling well. At the time of report, she has no headache and has not taken Tylenol, but she was weak and what she was calling weak may be fatigue. The patient was still getting hot and cold and hot and cold where her fingertips will be cold and then amazingly, she will be sweating. It was reported that, the patient usually does not sweat at all. She was smelling like something coming out of her body. At the time of report, the patient feels hot and cold, like if she was getting rid of the flu or something. It was reported that, the patient was not sure if this was related to chemotherapy or the immunotherapy Keytruda. The patient was taking some kind of immunity thing mushroom root capsule AHCC at the beginning of COVID and she takes for cancer to help boost her immune and not have residual cancer the capsules enhance Cytokine production, and she was taking a heavy dose 3g for past 3 weeks. The reporter was not sure if the events could have an adverse effect on the Pfizer COVID-19 Vaccine. The outcome of the events chills was recovering; the outcome of diarrhea, headache, and nausea was recovered while outcome of other events was unknown.  No follow-up attempts are needed. No further information is expected.