What is the normal range for adult white blood cells (WBCs)?

The normal range for adult white blood cells (WBCs) is 4,500 to 11,000 cells per microliter of blood. This range is established based on extensive research and clinical findings that indicate typical physiological levels of WBCs in healthy individuals. White blood cells are crucial components of the immune system, playing a significant role in defending the body against infections, foreign bodies, and diseases. Maintaining WBC counts within this specified range is essential for proper immune function.

Counts below 4,500 cells per microliter may indicate leukopenia, a condition that can reduce the body's ability to fight off infections. Conversely, levels above 11,000 cells per microliter could suggest leukocytosis, which may be associated with infections, inflammation, or other medical conditions. Understanding and monitoring WBC counts is a fundamental aspect of medical diagnostics and health assessments, making proficiency in interpreting these values vital for healthcare professionals.