In the United States, hemoglobin S and C traits are carried by 7.8% and 2.3% of African Americans, respectively, and 0.8% carry the beta-thalassemia trait (2).
In the United States, hemoglobin S and C traits are carried by 7.8% and 2.3% of African Americans, respectively, and 0.8% carry the beta-thalassemia trait (2).
在美国，美籍非洲人血红蛋白S和C的携带率分别为7.8%和2.3%，β地中海贫血的携带率为0.8%。