How many days can a white blood cell life?
White cells normally only live for between 7 or 8 hours in the blood stream, after which they need to be replaced by the stem cells in the bone marrow, which grow to produce new white cells. Because of this need for billions of neutrophils to be made each and every day, some of the marrow cells have to be continuously dividing. When you are given chemotherapy the marrow cells are affected and are not able to keep up with the demand for new white cells.
