A white blood cell count range value of 3.72×10^9/L requires a range based on the specific population, which may or may not be severe.
Normal values for white blood cell count are adults (3.5-9.5) x 10^9/L, infants (15.0-20.0) x 10^9/L, and children (5.0-12.0) x 10^9/L. For adults a white blood cell count range value of 3.72×10^9/L is normal, so it is not serious.
For infants and children a white blood cell count range value of 3.72×10^9/L is a low white blood cell count. It may be caused by sepsis, aplastic anemia and other diseases, which may affect life if not actively treated. So, it is more serious.
It is recommended that children with a white blood cell count range of 3.72×10^9/L should go to the hospital in time, do relevant examinations, clarify the cause of the disease, and then follow the doctor’s instructions for treatment, so as to avoid delaying the condition.