Answer by
TexasEm (311)
Leukopenia (low white blood cell count) is a decrease in leukocytes circulating in your blood. Leukocytes are commonly referred to as disease-fighting cells. Leukopenia can be the result of a simple virus, side effects of medications (such as prednisone), or more ominous bone marrow dysfunctions. Leukopenia weakens your immune system and puts you at risk for infection, but is treatable.