couldn''t sleep; she was too hot, too cold, had the chills; felt feverish; exhausted; achy all over; was very weak; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 73 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 21Oct2021 (Lot number: FF2593) at the age of 73 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "breast cancer lymphoma" (unspecified if ongoing), notes: It's been 7 years, and she is not supposed to do anything that that right arm; "Sleep apnoea" (unspecified if ongoing); "irregular heart beat" (unspecified if ongoing), notes: too fast; "Diabetes" (unspecified if ongoing); "Arthritis" (unspecified if ongoing), notes: in her hips bad, it's hard to walk up and down stairs; "doesn't have her thyroid" (unspecified if ongoing), notes: takes medication for that. There were no concomitant medications. Vaccination history included: Bnt162b2 (Dose number- 2, Lot number- EN6204), administration date: 19Mar2021, when the patient was 72 years old, for Covid-19 immunization, reaction(s): "tiredness"; Bnt162b2 (Dose number- 1, Lot number- EL9266), administration date: 22Feb2021, when the patient was 72 years old, for Covid-19 immunization, reaction(s): "tiredness"; Flu shot, administration date: Aug2021, reaction(s): "tenderness in that arm too". The following information was reported: INSOMNIA (non-serious) with onset Oct2021, outcome "unknown", described as "couldn''t sleep"; CHILLS (non-serious) with onset Oct2021, outcome "unknown", described as "she was too hot, too cold, had the chills"; PYREXIA (non-serious) with onset Oct2021, outcome "unknown", described as "felt feverish"; FATIGUE (non-serious) with onset Oct2021, outcome "unknown", described as "exhausted"; PAIN (non-serious) with onset Oct2021, outcome "unknown", described as "achy all over"; ASTHENIA (non-serious) with onset Oct2021, outcome "unknown", described as "was very weak". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of insomnia, chills, pyrexia, fatigue, pain, asthenia.  Additional information: Caller relays she did not have any side effects with the first 2, just a little tiredness for a few days. Caller stated after the booster she couldn't sleep, she was too hot, too cold, had the chills and had 3 layers of blankets on her and she felt feverish. States she was exhausted and achy all over. She was asking if the booster one was causing more, and she did not think it was an emergency. She took 2 Tylenol and did not think she needs more; she was exhausted because she did not sleep well. She stated that she the chills and shaking were for about 3 hours and she got a 3rd blanket and then she was too hot. She stated that she has not had throwing up or diarrhea and she did not take her temperature, so she did not know how warm she was. She stated that she was very weak. Stated she didn't get enough sleep and she could not nap very well but she will later. Stated this was minor and she was so glad we have the vaccine. Caller stated that she took some Tylenol ER and she did not feel chilled now. Vaccination Facility Type was pharmacy. Patient did not receive additional vaccines on same date of the. Patient did not go to emergency room or physician office. She has had the shingles shot and they went to Africa 2-3 years ago and she had no side effects from any of those. She had bloodwork done before at the hospital, in a week she sees her endocrinologist.  No follow-up attempts are possible. No further information is expected.