My sense of it is that the risk for stroke in people receiving the AZ vaccine is pretty minimal. I think it may be lower than the usual incidence of stroke in younger women actually. Since NO younger people are receiving the Moderna or Pfizer vaccines - there's no way to assess whether risk is higher with AZ - but it is being assumed to be so I think.
The CBC article states this - Dr. Howard Njoo, Canada's deputy chief public health officer, said people who develop stroke-like medical symptoms after receiving the AstraZeneca vaccine — shortness of breath, chest pain, leg swelling, abdominal pain, sudden onset of headaches or blurred vision — should immediately seek medical attention. There is no risk for people who have not developed such symptoms 20 days post-vaccination. REALLY? I think if these symptoms develop AT ANY TIME one should be seeking medical attention - not if it's just "after receiving the AZ vaccine" And I think "There is no risk for people who have not developed such symptoms 20 days post-vaccination." ... what does THIS mean?? Sigh.