Fever of 102.8 27 hours after injection.; Slept in about 3 hours longer this morning; Muscle pain on left arm beginning about 30 minutes after booster injection; First 2 vaccine injections: Moderna; booster dose: Pfizer; Booster injection; Fatigue about 5 hours after injection; This is a spontaneous report from a contactable reporter (consumer or other non hcp). The reporter is the patient.   A 57 year-old male patient received bnt162b2 (BNT162B2), administered in left arm, administration date 10Dec2021 at 16:15 (Lot number: unknown) at the age of 57 years as dose 3 (booster), single for COVID-19 immunisation. Relevant medical history included: "Sleep apnea" (unspecified if ongoing); "High cholesterol" (unspecified if ongoing), notes: Slightly high cholesterol; "Head pain" start date: an unknown date in 2016 (unspecified if ongoing), notes: Chronic head and neck pain from car accident 5 years ago; "Neck pain" start date: an unknown date in 2016 (unspecified if ongoing), notes: Chronic head and neck pain from car accident 5 years ago and "Accident automobile" (unspecified if ongoing), notes: Car accident 5 years ago. Concomitant medication(s) included: GABAPENTIN and ATORVASTATIN. Vaccination history included: Moderna covid-19 vaccine (DOSE 1, SINGLE, Lot number: unknown), administration date: an unknown date in Apr2021, when the patient was 57 years old, for COVID-19 immunisation and Moderna covid-19 vaccine (DOSE 2, SINGLE, Lot number: unknown), administration date: an unknown date in Apr2021, when the patient was 57 years old, for COVID-19 immunisation. The following information was reported: INTERCHANGE OF VACCINE PRODUCTS (non-serious) with onset 10Dec2021 at 16:15, outcome "unknown", described as "First 2 vaccine injections: Moderna; booster dose: Pfizer"; IMMUNISATION (non-serious) with onset 10Dec2021 at 16:15, outcome "unknown", described as "Booster injection"; MYALGIA (non-serious) with onset 10Dec2021 at 17:00, outcome "not recovered", described as "Muscle pain on left arm beginning about 30 minutes after booster injection"; FATIGUE (non-serious) with onset 10Dec2021, outcome "not recovered", described as "Fatigue about 5 hours after injection"; HYPERSOMNIA (non-serious) with onset 11Dec2021, outcome "not recovered", described as "Slept in about 3 hours longer this morning"; PYREXIA (non-serious) with onset 11Dec2021 at 19:15, outcome "not recovered", described as "Fever of 102.8 27 hours after injection". Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of pyrexia. Therapeutic measures were not taken as a result of myalgia, fatigue and hypersomnia.  Additional Information: The patient had no known allergies. Prior to vaccination, the patient was not diagnosed with COVID-19. The patient did not receive other vaccines within four weeks prior to COVID vaccine. Since the vaccination, the patient had not been tested for COVID-19. The events did not result in doctor or other healthcare professional office/clinic visit and emergency room/department or urgent care. It was reported that fever registered 90 minutes after taking 2 Tylenol. First 2 vaccine injections of Moderna were completed April2021.   The lot number for BNT162b2 was not provided and will be requested during follow up.