Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Thalassemias ?
    ### Response:
    Thalassemias (thal-a-SE-me-ahs) are inherited blood disorders. "Inherited" means that the disorder is passed from parents to children through genes.
                
Thalassemias cause the body to make fewer healthy red blood cells and less hemoglobin (HEE-muh-glow-bin) than normal.
    