According to The Mayo Clinic, the normal range for white blood cell counts (WBC) in both men and women should register between 3.5 and 10.5 billion cells per litre of blood. A white blood cell count of 3.6 is within the normal range.
There is Some Variability to the Numbers
A white blood cell count of 3.6 indicates a reading at the low end of the normal range and may require monitoring for further decreases in number. Low white blood cell counts may be a sign of infection or bone marrow disorder.
White blood cell counts vary with age and sex of the individual. Consultation with your family physician will aid in maintaining the appropriate number of white blood cells.