sudden hearing loss(total); vertigo; tinnitus; this is a spontaneous report received from a contactable reporter(s) (consumer or other non hcp) from the regulatory authority-web. regulatory number: gr-greof-202200009 (ra). a 36 year-old male patient received bnt162b2 (comirnaty), administration date 08dec2021 (lot number: unknown) as dose 3 (booster), single for covid-19 immunisation. relevant medical history included: "migraine" (unspecified if ongoing); "smoker" (unspecified if ongoing); "gnashing tooth" (unspecified if ongoing). the patient's concomitant medications were not reported. vaccination history included: covid-19 vaccine (manufacturer unknown, dose 1), for covid-19 immunization; covid-19 vaccine (manufacturer unknown, dose 2), for covid-19 immunisation. the following information was reported: deafness (disability, medically significant) with onset 09dec2021, outcome "not recovered", described as "sudden hearing loss(total)"; vertigo (disability, medically significant) with onset 09dec2021, outcome "not recovered", described as "vertigo"; tinnitus (disability, medically significant) with onset 09dec2021, outcome "not recovered", described as "tinnitus". therapeutic measures were taken as a result of deafness, vertigo, tinnitus. no improvement after 6 days of cortisone medication (iv),7 days per os cortisone and 1 week of inner ear medication. no follow-up attempts are possible; information about lot/batch number cannot be obtained. no further information is expected