How common is the sickle cell disease trait in america?

8-10%: The prevelance of sickle cell trait in african americans is thouight to be about 8 to 10 percent. It may be as high as 25 to 30 percent in certain parts of western africa.

Sickle trait common?: In the United States about 3 million have sickle cell trait (source www.Sicklecelldisease.Org). In african americans, approximately 1 in 12 carry the sickle cell trait.