Ischemic stroke after bivalent mRNA COVID-19 vaccination and influenza vaccination during the 2022-2023 season: a multi-site self-controlled case series study
Xu S; Sy LS; Hong V; Farrington P; Glenn SC; Kim S; Ryan DS; Tubert JE · 2026 · Preprint
WASTE classifies this as Negative / Null Result Report · AI classification, approximate
The study found no significant effect — useful as a negative control or null benchmark for your own design.
Abstract (excerpt)
Background The Vaccine Safety Datalink (VSD) detected a statistical signal for ischemic events (ischemic stroke or transient ischemic attack) following bivalent mRNA COVID-19 vaccination through prospective surveillance during 2022-2023.…
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Metadata source: Europe PMC · DOI 10.64898/2026.05.20.26353716