【新型コロナ】英当局、AZ製ワクチン接種後に血栓できた30人中、7人死亡と発表　「効果はリスクを上回る」

恐らくこのページが英国の医薬品・医療製品規制庁（MHRA）の該当する情報が載っているページですが、7人の死亡に関しては掲載されていません。情報更新が4/1となっているので、まだ反映されていない可能性があります。
ファイザー製では血栓症状は確認されていないようです。他にも多くの情報が載っているので気になる方はご参照ください。

Coronavirus vaccine - summary of Yellow Card reporting

www.gov.uk

↑より引用
Thrombo-embolic events

Our review has looked in detail at the 30 reports of blood clots with low platelet counts received up to and including 24 March. These reports have been analysed by MHRA scientists and clinicians, as well as by the Commission on Human Medicines (CHM), as part of an ongoing review.

The risk of having this specific type of blood clot is very small. Up to and including 24 March, we had received 22 reports of cerebral venous sinus thrombosis (CVST) and 8 reports of other thrombosis events with low platelets, out of a total of 18.1 million doses of COVID-19 Vaccine AstraZeneca given by that date. There were no reports for the Pfizer/BioNTech vaccine. We have thoroughly analysed each and every report as soon as it has come in. To note the current analysis prints include data up to and including the 21 March.