What is the normal white blood cell count range?

The normal white blood cell count range for healthy adults typically falls between 4,000 and 11,000 cells per microliter of blood, with many sources citing 4,000 to 8,000 as the more common reference range. However, option C, which states a range of 5,000 to 10,000, captures the middle of this broader spectrum and is widely accepted as a standard for evaluating white blood cell counts in clinical settings. This range reflects a sufficient threshold for immune response, balancing the body's needs to fight infection and maintain overall health.

The values below this range would indicate leukopenia, which could suggest conditions like bone marrow disorders or autoimmune diseases, while values above this range indicate leukocytosis, which can occur during infections, inflammation, or more serious medical conditions. Understanding the normal range is essential for making clinical decisions and diagnosing possible health issues.