“Up to 5 April 2021, the MHRA had received Yellow Card reports of 100 cases of major thromboembolic events (blood clots) with concurrent thrombocytopenia (low platelet counts) in the UK following vaccination with COVID-19 Vaccine AstraZeneca. These events occurred in 61 women and 39 men aged from 18 to 85 years and the overall case fatality rate was 22% with 22 deaths.
Of these, 99 reports were associated with the first dose of the vaccine and a single report followed a second dose, although this individual had medical conditions that could have caused the events. Fifty individuals had cerebral venous sinus thrombosis (average age 46 years) and 50 had other major thromboembolic events (average age 52 years) with concurrent thrombocytopenia.”
