That's a good question. I can imagine that there was a time before there was life on Earth, and then clearly there was a time X-hundred thousand years or a million years later when there were things that we would all recognize as biological.
What Causes High White Blood Cell Counts? White blood cell counts are elevated when the body is fighting an illness or disease, so a high count is indicative of an infection. Often, your doctor will order another round of tests after he or she determines you have a high white blood cell count.
What does a high white blood cell count mean. When a high white cell count is present, infection is usually the first cause that's considered and your doctor may follow up by ordering a differential count. This reveals the quantity of each type of white blood cell present which can give a clue as to the kind of infection that's present. For example, eosinophil counts go up with parasitic infections as well as with allergic disorders. Medications can also be a cause of a high white blood count. What does a low white blood cell count mean