has hot flashes then chills which are alternating throughout the day approximately 30 minutes apart; has hot flashes then chills which are alternating throughout the day approximately 30 minutes apart; spiking a periodic variable temperature between 101 degrees; Nausea; Abdominal pain and cramping; Vomiting; Diarrhea; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the parent.  A 21 year-old female patient received bnt162b2 (BNT162B2), administered in arm right, administration date 22Sep2021 11:45 (Lot number: 301308A) at the age of 21 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "no taste and smell", start date: 26Dec2020 (ongoing); "nausea", start date: 26Dec2020 (ongoing); "vomiting", start date: 26Dec2020 (ongoing); "no taste", start date: 26Dec2020 (ongoing); "passing out", start date: 26Dec2020 (ongoing); "hot flashes", start date: 26Dec2020 (ongoing); "chills", start date: 26Dec2020 (ongoing); "diarrhea", start date: 26Dec2020 (ongoing); "abdominal pain", start date: 26Dec2020 (ongoing); "headache", start date: 26Dec2020 (ongoing); "cramps", start date: 26Dec2020 (ongoing); "no period", start date: 26Dec2020 (ongoing). Concomitant medication(s) included: JUNEL FE 1.5/30 taken for contraception, start date: 2018 (ongoing). Vaccination history included: Bnt162b2 (Vaccine Name: First vaccine dose , Lot Number / Expiry Date: FC3182, Route, Anatomical Location: Right arm, Time: 6 pm), administration date: 01Sep2021, when the patient was 21 years old, for COVID-19 immunization, reaction(s): "Hot flashes", "chills", "got worse", "nausea", "sick", "pain in abdomen", "vomiting". The following information was reported: HOT FLUSH (non-serious), CHILLS (non-serious) all with onset 22Sep2021, outcome "not recovered" and all described as "has hot flashes then chills which are alternating throughout the day approximately 30 minutes apart"; PYREXIA (non-serious) with onset 22Sep2021, outcome "not recovered", described as "spiking a periodic variable temperature between 101 degrees"; NAUSEA (non-serious) with onset 22Sep2021, outcome "not recovered", described as "Nausea"; ABDOMINAL PAIN (non-serious) with onset 22Sep2021, outcome "not recovered", described as "Abdominal pain and cramping"; VOMITING (non-serious) with onset 22Sep2021, outcome "unknown", described as "Vomiting"; DIARRHOEA (non-serious) with onset 22Sep2021, outcome "not recovered", described as "Diarrhea". Relevant laboratory tests and procedures are available in the appropriate section.  Additional information: She had hot flashes then chills which are alternating throughout the day approximately 30 minutes apart. The caller confirms his daughter was currently experiencing the alternating hot flashes and chills, but he did not know if they have improved, stayed the same or worsened at all. She had been spiking a periodic variable temperature between 101 degrees during this period. It was been consistent, but it was variable so it comes and goes. She had also had nausea, abdominal pain, and cramping. He confirms her symptoms are persisting as his daughters reported to the caller. Lastly, she had vomiting and diarrhea. The diarrhea had been steady and consistent every day to the point she was having to drink a lot of fluids. The caller clarifies he did not know if his daughter had some of these symptoms before the vaccine. They only discussed what he was reporting. She did not mention if any of the symptoms or if some or if all of the symptoms were an issue beforehand. All the caller knows was what she mentioned to him during their visit.  Follow-up attempts are completed. No further information is expected.