AZ COVID Vaccine: Causal Link to Severe Thrombosis Established

April 13, 2021

(Medscape) – Two scientific studies establishing a causal relationship between the AstraZeneca COVID-19 vaccine and severe thrombotic complications have now been published. The articles — one from a German/Austrian/Canadian collaboration and one from a Norwegian group — were published online April 9 in the New England Journal of Medicine. A preliminary report of the German-led study was first published as a preprint on Research Square on March 28.