CVST With AZ COVID Vaccine: 1 in 40,000 ‘More Reliable’ Estimate

May 7, 2021

(Medscape) – A new study that systematically monitored rates of vascular and thromboembolic events in people receiving the AstraZeneca COVID-19 vaccine has found it to be associated with a rate of cerebral venous sinus thrombosis (CVST) of 1 in 40,000. Using national health records, the researchers identified rates of arterial and venous events in a cohort of 282,572 people aged 18-65 years within 28 days of receiving a first dose of the AstraZeneca vaccine in Denmark and Norway from February 2021 through to March 11, 2021 and compared these with expected rates in the general population of the same age and sex.