deep vein thrombosis - a second one occurred on 05dec; deep vein thrombosis leg; this is a spontaneous report received from a contactable reporter(s) (consumer or other non hcp) from the regulatory authority-web. regulatory number: at-basgages-2022-011110 (ra). a 38 year-old female patient received bnt162b2 (comirnaty), administration date 09nov2021 (lot number: 1g044a) as dose 3 (booster), single for covid-19 immunisation. the patient's relevant medical history and concomitant medications were not reported. vaccination history included: covid-19 vaccine (dose 1, manufacturer unknown), for covid-19 immunization; covid-19 vaccine (dose 2, manufacturer unknown), for covid-19 immunization. the following information was reported: deep vein thrombosis (hospitalization) with onset 13nov2021, outcome "not recovered", described as "deep vein thrombosis leg"; deep vein thrombosis (hospitalization) with onset 05dec2021, outcome "not recovered", described as "deep vein thrombosis - a second one occurred on 05dec". therapeutic measures were taken as a result of deep vein thrombosis, deep vein thrombosis. clinical information: treatment of the side effect: further treated with blood thinning, anti-inflammatories, and surgical stocking. medication takes place for at least two more months. an operation must be performed later. no follow-up attempts are possible. no further information is expected