what causes a low blood white count?
 A low white blood cell count can be related to a number of causes, including viral infections, cancer and diminished immune system function, systemic lupus erythematosus, Hodgkin's lymphoma, some types of cancer, typhoid, malaria, tuberculosis, dengue, rickettsial infections, enlargement of the spleen, folate deficiencies, psittacosis, sepsis, Sjögren's syndrome and Lyme disease. 