What is the normal range for White Blood Cell (WBC) count per microliter?

The normal range for White Blood Cell (WBC) count per microliter is 4,500 to 11,000. This range is accepted as a standard reference for evaluating immune function and identifying potential infections or other hematological conditions. A WBC count within this range suggests a balanced immune response, indicating that the body is adequately equipped to fight infections and respond to internal stressors.

Values outside this range can indicate various medical conditions. A count below 4,500 may suggest leukopenia, which can be due to bone marrow issues, autoimmune diseases, or the effects of certain medications. Conversely, a count above 11,000 may indicate leukocytosis, which could be caused by infections, inflammatory responses, stress, or more serious conditions like leukemia. Understanding this normal range is crucial for making informed clinical decisions and appropriately responding to a patient's health status.