There are many reasons for a low WBC count. HIV is one of them, although you may want to look at more common causes first.
Any viral infection can decrease the WBC count transiently. As the virus passes, the WBC will normalize again.
Persistently low WBC counts can also be due to various forms of lymphoma. If this is the case, a bone marrow biopsy can be considered.
Various immunosuppressive disorders, including HIV, can be considered. Because of this, I would advise testing.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
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