<s>[INST] Good afternoon, My WBC has fluctuated over the past few months. Below please find the most recent history along with previous counts. Blood results as follows: WBC (x10^3/uL) 3.30 L RBC 3.29 L HGB 11.70 L HCT 33.10 L MCH 35.60 H MPV 7.20 L LY % 52.00 H Neu # (ANC) (x10^3uL) 1.30L March 25, 2010 â?? 4300 â?? April 10, 2010 â?? 3500 May 7, 2010 â?? 4300 May 28, 2010 â?? 3300 What could be causing drastic fluctuations in my WBC? Also, I am very prone and susceptible to colds, flu, etc. since I have had the leukopenia. I am at the point where I have to spend most of my time at home to prevent illness. (HIV has been ruled out.) Gender: Female Age: 35 I thank you in advance for taking my question. Your assistance is greatly appreciated. Respectfully, Elena [/INST] Hi, dearI have gone through your question. I can understand your concern.You have leukopenia. Most common cause is viral infection. You are susceptible to viral infection because of low immunity.  However if you have persistent leukopenia then you should go for bone marrow examination once. Consult your doctor and take treatment accordingly.Hope I have answered your question, if you have any doubts then contact me at bit.ly/Drsanghvihardik, I will be happy to answer you.Thanks for using health care magic.Wish you a very good health </s>