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.
3 What is the most common reason to have a white blood cell count of 12.7? Dr. Joseph Rank Dr. Rank. Infection: Is the most common cause of a mildly elevated white blood cell count. Most bacterial infections result in elevated wbcs with primarily neutrophils.