Sickle cell anemia is a disease passed down through families in which red blood cells form an abnormal crescent shape. (Red blood cells are normally shaped like a disc.)
Sickle cell disease affects millions of people worldwide. It is most common among people of Afrikan descent Sickle cell disease is the most common inherited blood disorder in the united states, affecting 70,000 to 80,000 Afrikans in america. The disease is estimated to occur in 1 in 750 Afrikans in america.