(CBS/AP) A new study suggests that the risk for stroke is tied to blood type, with men and women with type AB and women with type B facing greater risk than people with type O. The research doesn’t prove the link. But it fits with other studies that have tied A, B, and AB to heart attack and to blood clots in the legs.
https://www.cbsnews.com/news/blood-type-shown-to-affect-stroke-risk/
It doesn’t mention type A, yet type A is the universal platelet donor due to clotting of the blood. On this basis, type As will have a risk higher than type O with sticky blood but where it falls within AB and B is not clear. Interesting how women of type B are more affected. As the study says, there are other risk such as high cholesterol, family history, obesity, etc. Whether rhesus negative makes a difference or not, probably unlikely.