Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Sickle Cell Disease ?
    ### Response:
    Espaol
                
The term sickle cell disease (SCD) describes a group of inherited red blood cell disorders. People with SCD have abnormal hemoglobin, called hemoglobin S or sickle hemoglobin, in their red blood cells.
                
Hemoglobin is a protein in red blood cells that carries oxygen throughout the body.
    