A vaccine safety monitoring system detected a "safety signal" that Pfizer's bivalent booster, which targets both the original strain of the virus from 2020 and the omicron subvariants BA.4 and BA.5, could be linked to an increased risk of ischemic stroke in those 65 and older. The agencies said, however, that subsequent analyses have not found an increased risk, indicating that the risk is low or nonexistent.
"There also may be other confounding factors contributing to the signal identified in the VSD that merit further investigation," the agencies said in a statement. "It is important to note that, to date, no other safety systems have shown a similar signal and multiple subsequent analyses have not validated this signal."
Comment: Except for the many people keeling over suddenly.
The potential risk that was identified in Pfizer's vaccine was not seen with Moderna's bivalent COVID-19 vaccine.
Comment: Yea, right. We're not holding our breath.