pericardial effusion; this is a spontaneous report received from a contactable reporter(s) (physician) from the regulatory authority web. regulatory number: gr-greof-202200440 a 28 year-old female patient received bnt162b2 (comirnaty), administration date 04dec2021 (batch/lot number: unknown) as dose 2, 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; manufactuerer unknown), for covid-19 immunisation. the following information was reported: pericardial effusion (medically significant) with onset 07dec2021, outcome "recovered" (17jan2022), described as "pericardial effusion". no follow-up attempts are possible; information about lot/batch number cannot be obtained. no further information is expected