The Covid vaccine may be linked to a small increase in stroke risk when given alongside a high-dose flu shot, health officials say.

A new analysis by the Food and Drug Administration found the link was clearest in adults over 85 and only applied to the Pfizer and Moderna bivalent Covid booster vaccines.

The FDA said the risk might stem from the flu vaccine alone and be completely unrelated to the Covid shots. Regardless, the report said the risk is still very small.