High WBC is a mystery. I've been checked for every possible bacterial and viral infection. That was one of the first rounds of tests I was given. All negative. Interestingly, my PCP is more concerned with WBC and my hematologist is more concerned with my RBC. Personally, I feel they are both important since they are both out of range, significantly at times. I have no idea what is going on here. It bothers me to just sit and wait for something bad to happen.