High fever (103.2 - forehead scan); Swollen glands, with a large, swollen gland in left armpit; Severe headache/splitting headache; sensitivity to sound; Nausea; Muscle aches; swallowing issues; very tender; Very sore left arm at injection site; This is a spontaneous report received from contactable reporter(s) (Consumer or other non-healthcare professional). The reporter is the patient. A 71-year-old male patient received bnt162b2 (BNT162B2), intramuscular, administered in arm left, administration date 08Oct2021 01:10 (Lot number: EWC172) at the age of 71 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Urinary retention", start date: 2019 (unspecified if ongoing), notes: Resolved at ER, "Flu", start date: 2017 (unspecified if ongoing), notes: Fever, flu symptoms. Concomitant medication(s) included: OMEPRAZOLE taken for reflux gastritis, start date: 06Mar2021 (ongoing), TAMSULOSIN taken for urinary retention, start date: 06Mar2021 (ongoing). Vaccination history included: Bnt162b2 (Dose Number: 1, Location of injection: Arm Left, Vaccine Administration Time: 08:00 AM, Route of administration: Intramuscular, Batch/lot number: EJ1686) administration date: 18Jan2021, when the patient was 70 years old for COVID-19 immunisation, Bnt162b2 (Dose Number: 2, Location of injection: Arm Left, Vaccine Administration Time: 12:00 PM, Route of administration: Intramuscular, Batch/lot number: EM9810), administration date: 08Feb2021, when the patient was 70 years old, reaction(s): "Seriously high fever", "splitting headache", "Sore arm at injection site", "muscle aches", "lethargy", "Malaise", "Swollen lymph node - size of golf ball-under left arm (injection arm)". The following information was reported: PYREXIA (non-serious) with onset 08Oct2021 21:00, outcome "recovered" (16Oct2021), described as "High fever (103.2 - forehead scan)", LYMPHADENOPATHY (non-serious) with onset 08Oct2021 21:00, outcome "recovering", described as "Swollen glands, with a large, swollen gland in left armpit", HEADACHE (non-serious) with onset 08Oct2021 21:00, outcome "not recovered", described as "Severe headache/splitting headache", HYPERACUSIS (non-serious) with onset 08Oct2021 21:00, outcome "not recovered", described as "sensitivity to sound", NAUSEA (non-serious) with onset 08Oct2021 21:00, outcome "not recovered", described as "Nausea", MYALGIA (non-serious) with onset 08Oct2021 21:00, outcome "not recovered", described as "Muscle aches", VACCINATION SITE PAIN (non-serious) with onset Oct2021, outcome "unknown", described as "Very sore left arm at injection site", DYSPHAGIA (non-serious) with onset 08Oct2021, outcome "recovered" (09Oct2021), described as "swallowing issues", TENDERNESS (non-serious) with onset Oct2021, outcome "not recovered", described as "very tender". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were not taken as a result of pyrexia, lymphadenopathy, headache, hyperacusis, nausea, myalgia.  Additional information: Patient received Vaccination Facility in Hospital. The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. Patient did not receive any other medication within 2 weeks of vaccination. Patient was not diagnosed with Covid-19 prior to vaccination. Patient did not tested for Covid-19 since the vaccination. On 08Oct2021 after Covid 19 vaccine booster reaction occurred 8 hours after injection on 08Oct21 and was lingering through today 17Oct2021. High fever (103. 7) continued 2 days, fever of 100+ continued for four days. Very sore left arm at injection site. Large lymph node appeared size and small apple and very painful. Muscle pain and some muscle cramping in hands + arms. Splitting headache, swallowing issues on 1st + 2nd days, Fever normal on day 8. Swollen gland. shrunk by day 8 to size of Walnut-still very tender. Physician appointment upcoming 21Oct2021.  Follow-up (27Oct2021): Follow-up attempts are completed. No further information is expected.