Stroke and mRNA Vaccine: An Update From The Last CDC’s Announcement
A new study revealed no association between combined Covid and influenza vaccination with stroke, contrary to CDC’s report.
Earlier this year in January, the Food and Drug Administration (FDA) and Centers for Disease Control and Prevention (CDC) announced a preliminary analysis finding an increased risk of stroke after Covid (bivalent mRNA) and influenza (adjuvanted or high-dose) co-vaccination.
I covered this topic in detail here: Stroke and mRNA Vaccine: A Closer Look Into What’s Going On. Briefly, a 1.47 times increased risk of ischemic stroke was noted following Pfizer’s bivalent mRNA vaccination in those over 65 years in the U.S. Vaccine Safety Datalink (VSD) database.
Further analysis revealed that this risk is limited to those who were co-vaccinated with influenza (high dose or adjuvanted) vaccine on the same day, showing a 2-times increased risk (Figure 1). No changes in risk were seen in bivalent mRNA without influenza vaccination, bivalent mRNA + standard-dose influenza vaccination, or influenza vaccination alone.
This analysis, thus, suggests that high immune responses from strong vaccination stimuli may trigger stroke in susceptible individuals.
