"IF" we considered the white blood cell to be food waste being attacked in the blood stream, then I would assume this:
When harmed, the white cell count would drop, because your Immune System would not be operating fully. Clark tried to prove our Immune System works according to the atomic clock world wide and after you got a bomb dropped near you, your clock would be greatly disturbed and Immune System turned upside down and does account for less white blood cells, because the food would travel freely in the blood and not show up as being worked upon as white blood cells.
YES, it would seem logical no white blood cells as we drown in outr own food waste.
The stomach cleanses the blood, SO YES, if your poisoned and was healthier before, the stomach would cleanse the blood and expel great amounts of waste down the bowel.
The Breathairian should have little to no white blood cells, because they would have very little waste in their blood stream.
The cure for too high white blood cell count is fruit juice fasting; it has always been the cure for Leukemia. UNLESS the Leukemia was drug induced, then your dealing with drugs and bad off.
If you don't play with drugs, health can be very simple.