
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.
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.