headache; vertigo; dose 2: 23sep2021 / dose 3: 03feb2022 = 134 days; this is a spontaneous report received from a contactable reporter(s) (physician) from the ra-web. regulatory number: it-minisal02-844245. a 13 year-old female patient received bnt162b2 (comirnaty), administered in arm left, administration date 03feb2022 (batch/lot number: unknown) as dose 3 (booster), single for covid-19 immunisation. the patient's relevant medical history and concomitant medications were not reported. vaccination history included: comirnaty (dose 1, single), administration date: 02sep2021, for covid-19 immunization; comirnaty (dose 2, single), administration date: 23sep2021, for covid-19 immunization. the following information was reported: headache (hospitalization) with onset 04feb2022, outcome "recovered" (15feb2022), described as "headache"; vertigo (hospitalization) with onset 04feb2022, outcome "recovering", described as "vertigo"; inappropriate schedule of product administration (non-serious) with onset 03feb2022, outcome "unknown", described as "dose 2: 23sep2021 / dose 3: 03feb2022 = 134 days". no follow-up attempts are possible; information about lot/batch number cannot be obtained. no further information is expected