axillary lump; armpit pain; fatigue; inappropriate schedule of vaccine administered; this is a spontaneous report received from a contactable reporter(s) (consumer or other non hcp) from the regulatory agency (ra). regulatory number: gb-mhra-webcovid-202202181552298920-gecl7 (ra). other case identifier(s): gb-mhra-adr 26621346 (ra). a 12 year-old male patient received bnt162b2 (comirnaty), administration date 16feb2022 (lot number: fl9994) at the age of 12 years as dose 2, single for covid-19 immunisation. relevant medical history included: "benign hypermobility" (unspecified if ongoing). patient has not had symptoms associated with covid-19. not had a covid-19 test. patient is not enrolled in clinical trial. the patient's concomitant medications were not reported. vaccination history included: comirnaty (dose 1), administration date: 18nov2021, for covid-19 immunization. the following information was reported: axillary mass (medically significant) with onset 18feb2022, outcome "not recovered", described as "axillary lump"; axillary pain (medically significant) with onset 18feb2022, outcome "not recovered", described as "armpit pain"; fatigue (medically significant) with onset 16feb2022, outcome "not recovered", described as "fatigue"; inappropriate schedule of product administration (non-serious) with onset 16feb2022, outcome "unknown", described as "inappropriate schedule of vaccine administered". the report does not relate to possible inflammation of the hear (myocarditis or pericarditis). patient has not tested positive for covid-19 since having the vaccine. no follow-up attempts are possible. no further information is expected