Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Iron-Deficiency Anemia ?
    ### Response:
    The signs and symptoms of iron-deficiency anemia depend on its severity. Mild to moderate iron-deficiency anemia may have no signs or symptoms.
                
When signs and symptoms do occur, they can range from mild to severe. Many of the signs and symptoms of iron-deficiency anemia apply to all types of anemia.
    