U.S. CDC still looking at whether there is a potential stroke risk from Pfizer bivalent COVID shot

U.S. CDC still looking at potential stroke risk from Pfizer bivalent COVID shot New data from one U.S. Centers for Disease Control and Prevention (CDC) database shows a possible stroke risk link for older adults who received an updated Pfizer /BioNTech COVID-19 booster shot, but the signal is weaker than what the agency had flagged earlier in January, health officials said on Thursday. Michael Erman Reuters

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U.S. Food and Drug Administration officials said they had not detected a link between the shots and strokes in two other safety monitoring databases.

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Most of the confirmed cases had also received a flu vaccine at the same time, which might be a factor, she said.

FDA scientist Richard Forshee said the agency plans to study whether there is any increased risk of stroke from receiving the two shots at the same time.