COVID-19 vaccines do not raise the risk for acute arterial ischemic stroke. The prevalence of AIS is actually 200 times lower following vaccination compared to the risk of AIS complicating moderate to severe COVID-19 infection, new research shows.
AIS has been reported as a rare adverse event after COVID-19 vaccination with mRNA or viral-vector vaccines. However, data are limited regarding the risk for postvaccination AIS, potentially resulting from thrombotic thrombocytopenia syndrome .
"Thus, even when comparing to conservative estimates of AIS of roughly 1% among hospitalized COVID-19 patients , the prevalence of AIS is about 200 times lower following COVID vaccination compared to the risk of AIS complicating moderate to severe COVID-19 infection," the investigators write.
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