This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient. A 73 year-old female patient received bnt162b2 (BNT162B2), administration date 20Dec2021 (Batch/Lot number: unknown) at the age of 73 years as dose number unknown (booster), single for Covid-19 immunization. The patient's relevant medical history and concomitant medications were not reported. Vaccination history included: Covid-19 vaccine (Unknown manufacturer, dose 1), for COVID-19 immunization; Covid-19 vaccine (Unknown manufacturer, dose 2), for COVID-19 immunization. The following information was reported: IMMUNISATION (non-serious) with onset 20Dec2021, outcome "unknown", described as "she received the booster dose of Pfizer Covid vaccine on early afternoon on Monday"; HEADACHE (non-serious) with onset 20Dec2021, outcome "unknown", described as "headache"; BEDRIDDEN (non-serious) with onset 20Dec2021, outcome "unknown", described as "She has been in bed for 2 days"; CHILLS (non-serious) with onset 20Dec2021, outcome "unknown", described as "chills"; HYPERHIDROSIS (non-serious) with onset 20Dec2021, outcome "unknown", described as "sweats"; DIARRHOEA (non-serious) with onset 20Dec2021, outcome "unknown", described as "a little diarrhea"; NAUSEA (non-serious) with onset 20Dec2021, outcome "unknown", described as "nausea"; PYREXIA (non-serious) with onset 20Dec2021, outcome "unknown", described as "101.2 fever"; PAIN (non-serious), MYALGIA (non-serious) all with onset 20Dec2021, outcome "unknown" and all described as "body /muscle aches"; FEELING ABNORMAL (non-serious) with onset 20Dec2021, outcome "unknown", described as "feels like ran over by truck"; LETHARGY (non-serious) with onset 20Dec2021, outcome "unknown", described as "lethargic"; ASTHENIA (non-serious) with onset 20Dec2021, outcome "unknown", described as "low energy"; FATIGUE (non-serious) with onset 20Dec2021, outcome "unknown", described as "very tired"; MALAISE (non-serious) with onset 20Dec2021, outcome "unknown", described as "don't feel good/does not feel good". Relevant laboratory tests and procedures are available in the appropriate section. Additional information: Caller stated she received the booster dose of Pfizer Covid vaccine on early afternoon on Monday, shortly after lunch. She stated she slept and woke up due to headache. She started experiencing Symptoms later in the day on Monday after getting the booster dose. She has been in bed for 2 days, having headache, chills, sweats, a little diarrhea, nausea, 101.2 fever, body /muscle aches, feels like ran over by truck, lethargic, low energy, very tired, and don't feel good. Caller wanted to know if she should self-quarantine or can she go see her family Saturday and Sunday. Caller wanted to know if it is true that people get omicron after getting the vaccine. She stated it was in the news that 2 people got the mild case of omicron after getting the booster shot of the Pfizer Covid vaccine. Caller was a consumer that was calling about with some questions about the side effects from the Covid-19 Booster dose. Caller said that she has had symptoms since Monday. She said that she wants to know if it would be safe to be around her family for Christmas? Is she contagious or does she have a slight case of Omicron? Does she not feel good from the booster, and should she quarantine. The lot number for bnt162b2 was not provided and will be requested during follow up.