I think it means this person needs to have another blood test done. I've never heard of someone with no white cells... How could they survive any kind of infection?
I’d imagine the doctors will investigate etiologies other than HCV to explain this. Wikipedia’s article on Leukopenia says:
“Low white cell counts are associated with chemotherapy, radiation therapy, leukemia (as malignant cells overwhelm the bone marrow), myelofibrosis and aplastic anemia (failure of white and red cell creation, along with poor platelet production). In addition, many common medications can cause leukopenia (see below). HIV and AIDS are also a threat to white cells.
Other causes of low white blood cell count include: Influenza, systemic lupus erythematosus, Hodgkin's lymphoma, some types of cancer, typhoid, malaria, tuberculosis, dengue, Rickettsial infections, enlargement of the spleen, folate deficiencies, psittacosis and sepsis. Many other causes exist, such as a deficiency in certain minerals such as copper and zinc.”
http://en.wikipedia.org/wiki/Leukopenia
I’ve never spoken with HCV patients that report drastically altered white cell counts as a result of their disease in the absence of interferon therapy; maybe others will chime in with their experiences,
--Bill