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.
A high count indicates the presence of inflammation in the body. Because white blood cells are calculated by the number of cells per volume of blood, test results can vary between labs. Different labs use different degrees of measurements for the white blood cell count.
If your count is too low or too high, you may have a white blood cell disorder. A number of diseases and conditions may influence white blood cell levels: Weakened immune system. This is often caused by illnesses such as HIV/AIDS or by treatments related to cancer.