A person with leukopenia has a low number of white blood cells, or leukocytes, in their blood. A low white blood cell count may make a person more likely to contract an infection. White blood cells ...

A person has leukopenia if they have a reduced number of total white blood cells in their blood. According to the Leukemia & Lymphoma Society, a healthy white blood cell count is 5,000–10,000 white ...