What do we know about blood clots after AstraZeneca?

Embargoed until: Publicly released: 2021-08-12 07:00

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People with blood clots in the brain and low platelet counts appear to be the least likely to survive after developing the rare condition Vaccine-Induced Thrombocytopenia and Thrombosis (VITT) after their AstraZeneca vaccine. Researchers looked at the cases of 170 definite and 50 probable cases of the condition, with their findings showing the incidence of VITT was about one in 50,000 for those under 50 years of age. The patients most commonly presented with symptoms two weeks after vaccination, with presentations ranging from five to 48 days. 22 per cent of the cohort had died at the conclusion of the study, with blood clots in the brain, brain bleeding and low platelet counts common among those most severely affected. The study did not identify any specific patterns in the medical history of the patients.