Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Leukemia ?
    ### Response:
    Common symptoms of leukemia may include -  fevers  - frequent infections  - feeling weak or tired  -  headache  - bleeding and bruising easily  - pain in the bones or joints  -  swelling or discomfort in the abdomen (from an enlarged spleen)  -  swollen lymph nodes, especially in the neck or armpit  - weight loss.
    