AstraZeneca-linked blood clot confirmed in Alberta: Dr. Hinshaw Chief Medical Officer of Health Dr. Deena Hinshaw issued the following statement on a confirmed case of vaccine-induced immune thrombotic thrombocytopenia (VITT) in a patient after receiving the AstraZeneca vaccine: Some parts of this page will not display. JavaScript is not available in this browser or may be turned off. “We have confirmed a case of the rare blood clot disorder known as VITT in Alberta. The patient is a male in his 60s who has received treatment and is recovering. To protect patient confidentiality, additional details will not be publicly released.