Ischaemic stroke can follow COVID-19 vaccination but is much more common with COVID-19 infection itself

Thrombotic complications occurring as part of COVID-19 related vaccine-induced immune thrombotic thrombocytopaenia (VITT) can include ischaemic stroke as well as cerebral venous thrombosis

The COVID-19 pandemic has had a major impact on stroke. While there was marked drop in hospitalised stroke cases worldwide particularly during the first wave,1 2 epidemiological data have shown a real increase in stroke incidence with cases primarily occurring out of hospital and especially in care homes.3 Therefore, COVID-19 infection itself is a risk factor for stroke, and a recent systematic review reported it occured in 1.4% of COVID-19 infections.4 A characteristic pattern is found with increased large artery occlusion, and an increased proportion of cryptogenic strokes often affecting multiple arterial territories, while small artery stroke is less common.4 Both stroke severity and mortality are increased compared with non-COVID-19 related stroke. A major factor underlying this…

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