I have both candida and mercury toxicity. My WBC has always ranged from 3-3.6 or so for many years, at least since high school. Doctors just said not to worry about it, probably because they had no clue why it was happening. I also have slightly elevated eos and basos. The other parameters are always normal.
Three months after my Amalgams were out, my WBC went up to about 6.4. Interesting. So I don't know if it was mercury or candida or both.