The CDC said one of its monitoring systems detected a preliminary safety signal for stroke in people ages 65 and older who received the Pfizer omicron booster.
The CDC said one of its monitoring systems detected a preliminary safety signal for stroke in people ages 65 and older who received the Pfizer booster shot targeting the omicron variant.
A patient receives a Covid-19 vaccine booster shot at a Pfizer-BioNTech vaccination clinic in Southfield, Michigan, on Sept. 29, 2021.The Centers for Disease Control and Prevention on Friday said it is "very unlikely" the Pfizer omicron booster carries a risk of stroke for seniors after it launched an investigation into a preliminary safety concern detected by one of its monitoring systems.
No other surveillance system has detected a similar safety concern for the Pfizer booster so far, according to the CDC. Investigators have not found an increased risk of stroke following the Pfizer booster after reviewing data from the Center for Medicare and Medicaid Services, the Department of Veterans Affairs, the Vaccine Adverse Reporting System and Pfizer's global safety database.
The investigation will be discussed at an upcoming meeting of the Food and Drug Administration's panel of independent vaccine experts on Jan. 26.
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