Pfizer Bivalent Vaccine Linked to Strokes in Preliminary Data

Pfizer Inc.’s bivalent shot for Covid-19 has shown a potential link to stroke in people 65 and older, according to US health officials citing preliminary data from one of several vaccine safety databases.

The potential risk with Pfizer’s vaccine was not seen in other safety databases, nor was it seen with Moderna Inc.’s Covid vaccine, the officials said in a statement on the Food and Drug Administration’s website. The early finding still needs more investigation, and recommendations for the vaccine have not been changed, the statement said.