Fever; Chills; Body aches; Dull headache; booster; Stuffy nose; Tired; Sleeping a bit more; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 63 year-old male patient received bnt162b2 (BNT162B2), administered in arm, administration date 11Dec2021 (Lot number: FD0809) at the age of 63 years as dose 3 (booster), single for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Bnt162b2 (LOT: ER8730, Anatomical Location: Arm), administration date: 31Mar2021, when the patient was 62 years old, for COVID-19 immunization; Bnt162b2 (LOT: EW0169, Anatomical Location: Arm), administration date: 22Apr2021, when the patient was 62 years old, for COVID-19 immunization. The following information was reported: IMMUNISATION (non-serious) with onset 11Dec2021, outcome "unknown", described as "booster"; PYREXIA (non-serious) with onset 12Dec2021, outcome "not recovered", described as "Fever"; CHILLS (non-serious) with onset 12Dec2021, outcome "recovered" (Dec2021), described as "Chills"; PAIN (non-serious) with onset 12Dec2021, outcome "recovered" (Dec2021), described as "Body aches"; HEADACHE (non-serious) with onset 12Dec2021, outcome "recovered" (Dec2021), described as "Dull headache"; NASAL CONGESTION (non-serious) with onset Dec2021, outcome "not recovered", described as "Stuffy nose"; FATIGUE (non-serious) with onset Dec2021, outcome "unknown", described as "Tired"; SOMNOLENCE (non-serious) with onset Dec2021, outcome "unknown", described as "Sleeping a bit more". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of pyrexia, headache, nasal congestion. Therapeutic measures were not taken as a result of chills, pain.  Additional information: Patient stated that his Pfizer COVID-19 vaccine booster Saturday and the following day he had more side effects than last time he had any. Patient told he was getting better but he has the booklet they gave out that says the booster doesn't give you COVID, but tomorrow patient had an appointment with someone to get his toenails cut and wanted to make sure it is ok to keep that appointment. Patient told his side effects were that had a fever that has been coming and going, and most of his other symptoms were gone. Patient told had chills and body aches on Sunday and a dull headache that was almost gone, and a stuffy nose that was getting a little better. Patient said that temp was 102 degrees Fahrenheit at the highest, it has come and gone, it was sometimes 101 or 100 and now it was 99.3 degrees Fahrenheit. patient told it comes and goes too, so patient was wondering if it would be ok to wear a mask and keep this appointment tomorrow in the morning? Patient said that he was tired and sleeping a bit more. Patient said he took aspirin for the fever, dose unknown, he just took one and then later he maybe took another after a few hours. He said after a while it went away, and this afternoon then it came back. He said his temp was 98.5 now or 98.9, it goes back and forth he guesses, he has a handheld thing to take his temperature that you put on or near forehead. Patient said he had chills mostly on Sunday afternoon, and he did no treatment other than being bundled up, drinking water, using a heating pad type thing that put in a microwave to warm it up, a bag type thing. He said he only had chills on Sunday though he did feel a little cool today, it was not chills, he just felt cold again, so he did the same thing, got in the bed and warmed up. He said the body aches were Sunday afternoon or early evening maybe. He said for treatment he just heated up and keep warm, and warm up. Patient said for the dull headache he had the Aspirin and would blow his nose and take Flonase to try to help his sinuses, he was a little stuffed up still. He said the dull headache was not as bad, and it started Sunday.   Follow-up attempts are completed. No further information is expected.